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Only a fool would take anything posted here as fact.

Only a fool would take anything posted here as fact.

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how?

>>

x = OP's brain capacity.

>>

>>684964480

x = -3

x = 0

>>

2x^2 + 6x = 0

6x = 2x^2

x = you need to count alone. Its not my homework faggot

>>

x=-3 ,fagot

>>

>>684964663

6x=-2x^2

>>

>>684964617

x is diferent of 0 faggot

>>

>>684964480

zero is definitely a solution

>>

>>684964480

It is not hard.

https://en.wikipedia.org/wiki/Quadratic_equation

Easy way to solve this one (only applies to Equations of the form x^2 + p*x + q = 0)

-(p/2) +- sqrt((p/2)^2 -q)

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>>684964480

You're either <14 or retarded

>>

>>684965126

and thank me later

>>

pq-formula

x^2 + (6x)/2 = 0

-3/2 +- sqrt( (3/2)^2 )

x1 = -3/2 + 3/2 = 0

x2 = -3/2 - 3/2 = -3

>>

>>684964480

just brute force it

what happens if you set x=1

then 2, 3... if it doesnt go anywhere, go backwards

>>

>>684965330

It has to be +- to get multiple solutions

>>

>>684965421

idiot nigger

>>

2x^2 + 6x = 0

2x(x+3) = 0

x=0 v 2x+3=0

x=0 v x=-3

>>

>>684965378

This.

And btw OP i would not ask this on /b/ but whatever

>>>/sci/

>>

>>684964988

>>684964988

faggot your mother

>>

>>684965463

tends to work with highschool tier equations though

trust me

I teach maths grades 5-12

>>

>>684965463

whats the problem? dont need no fancy formula if a simple heutistic gets you to the solution

>>

>>684965560

How do you get 2 x's ?

>>

>>684964480

factorize nigga

2x(x+3)=0

>>

>>684965126

You don't need the quadratic equation to solve this.

>>

x=0 or x=3

because:

x(2x+6)

the factors have to be 0

>>

>>684965901

xÂ² means x times x

therefore 2xÂ² means 2 times x times x

separate as necessary

>>

>>684965673

>>684965793

Look at this dumb nigger

Do you teach your kids your nigger math?

>>

>>684965793

*heuristic

sry, missed my r button, stupid mobile phones

>>

It's got 2 fucking solutions : x1 and x2..

/_\ = b^2 - 4*a*c = 6^2 - 4*2*0 = 36

x1 = (-b + sqrt(36) ) / 2a = (-6 + 6) /2 = 0

x2 = (-6 - 6 ) /2 = -6

You guys are retarded

>>

>>684965560

This.

2x^2 + 6x = 0

2x(x+3) = 0

2x = 0 or x+3 = 0

x = 0 or x = -3

x = 0 or -3

>>

>>684966162

no

each of my kids are smarter than most of you dipshits combined so they figure this shit out for themselves

>>

>>684966220

https://www.mathsisfun.com/algebra/quadratic-equation.html

>>

>>684966162

fuck you, this is simple integer math, just plot the function and search the graph, i can do this in my head. why waste time?

>>

>>684966346

I'm a biomedical engineer going after my PhD so yes please tell me how much smarter your kids are.

Dumbass

Protip that shit doesn't work for real math

>>

>>684965673

tends to not work if a fraction is one of the solutions

trust me

I teach your mom how to sex properly

>>

>2x^2 + 6x = 0

>2x(x + 3) = 0

>x = 0

>x + 3 = 0 ; x = -3

eZ

>>

>>684966453

Because you can also factor things in your head retard

>>

>>684966492

instead of yanking it with one hand, and patting yourself on the back with the other, show us your solution.

>>

>>684966220

Oops

x2 = (-6 -6) / 2*2 = -12 / 4 = -3

My bad

>>

just use the quadratic equation whenever you see a quadratic. In your case a=2, b=6 c=0>>684964480

When entering into your calculator do it twice. once with the += being a + and the other a minus for multiple solutions.

>>

>>684965038

Divide all terms by X and you see it'sactually a linear equation with one solution.

2x + 6 = 0

Tell me how zero is a solution again?

>>

>>684966705

Sorry += should be +-

>>

>>684966632

2x(x+3)=0

X=0,-3

Super hard nigger

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>>684964480

>2x^2 + 6x = 0

wolframalphadotcom

>>

>>684966760

its a quadratic. basic year 10 maths. maybe even year 9

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>>684966760

Because you can't just drop variables

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>>684966864

In Romania you do this in the 8th grade.

>>

Should we /thread this shit? I think all of us know that the solution is x= -3 x= 0

>>

>>684966760

You can't divide by zero you fucking cuck

>>

>>684967000

How are you still a shithole then?

>>

Here you go op, good thing for you I'm a math major. Also work as a math tutor.

>>

>>684967000

year levels and grade a probably different. is aus it goes R, 1-12

>>

>>684964480

quit school

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>>684966760

the f...? what? you insert 0 as x into the original function and get a correct solution

>>

>>684966492

>Protip that shit doesn't work for real math

protip

I have an m.sc. in maths and cs

"""real""" maths is not what you do in biomed. eng., its just crunching numbers

"""real""" maths is not what this thread is about

"""real""" maths has nothing to do with highschool maths, such as solving quadratic equations

if you have problems with THIS, best give up on that phd.

>>684966568

>trying integers tends not to work if the solution is not an integer

thanks captn obvious.

if you could into reading comprehension, you'd understand that what I said is:

your typical highschool homework quadratic equation is likely to have at least one integer zero

because fuck correcting anything else, thats too much work x30 kids

>>

>>684967081

tf are you even doing. wrong unit

>>

>>684966828

>clearly a school problem

>shows no working

Stop trying to be a smart arse all the fucking time.

>>

>>684967108

>implying your college degree means something if you don't actually have it

>>

report for underage b8

>>

>>684966760

this is how NOT to solve a quadratic equation, children.

>>

>>684965673

I feel sorry for the kids you teach.

How hard is it to teach them to factorise out the x. Don't even need to teach the quadratic equation.

>>

>>684967220

>Implying in general you faggot

>>

>>684966760

by doing this you must assume that x is not equal to zero.

>>

>>684964480

2x^2 + 6x = 0

2x^2 = -6x

x^2 = -3x

x = -3

2 (-3)^2 + 6(-3) = -

2 (9) + (-18) = 0

18 - 18 = 0

check

>>

>>684966022

How is this so far down. We've had people suggesting trial and error, quadratic formula...

But it's done in like a second if you do this, and it's easy.

>>

>>684967049

It's not dividing by zero, it's dividing zero by a variable

>>684966864

>>684966938

But if you divide the whole equation by X (both sides), it doesn't change the value of the equation, just rearranges it.

>>

>>684967182

What the fuck does that even mean?

>>

>>684967242

read the thread again. you will notice that that is literally what I advocate

>>

>>684965673

You have got to be a kid in a remedial math class who never had to deal with x being anything other than an integer. Have fun with low math scores on your ACT and SAT. I had horrible math teachers in high school and none of them were so bad as to recommend brute force for algebra.

>>

no one uses this simple shit tho?

2x^2 = -6x

2x = -6

x = -3

x = 0, known from the start

>>

>>684964988

retard, for this to be valid, you have to transform this expression into its canonic (idk how to say it in english) form and then you get to find the solutions. and 0 is one of them

>>

>>684967193

No working? He's done the one single step needed to solve this problem. Once you get to the first bit, it's clear either one of the 2 sections is 0.

>>

>>684965901

your parents must be very proud of you

>>

>>684967178

>implying calculus/def eq isn't real math

Just keep telling me that I don't know how to math as I use math to program mathematically based biological systems in MATLAB

Pleb math majors thinking only math majors use math

>>

2x^2 + 6x = 0

x(2x +6) = 0

2x +6 = 0

2x = 6

x = 3

Answer is x = 0, x = 3

>>

>>684967193

here is working out.

>>

>>684966760

>>684967346

>guaranteed replies

I never thought I'd see even an algebra thread trolled this hard.

>>

>>684967401

>projecting this hard

lol k

>>

>>684966022

the proper way to do it finally

>>

>>684965424

don't feed the summer

>>

>>684967599

Pardon me, its x = -3

2x +6 = 0

2x = -6

x = -3

>>

>>684967193

That's all the work it requires

If you can't figure out the gap steps you're retarded

>>

>>684967599

2x = -6*

cant move it to the other side without giving in a minus

>>

>>684967612

This is how its done idiots. disregard everything else.

>>

>>684967629

/b/ will argue about anything.

Also: fuck you, you're wrong.

>>

>>684967308

>being this mad

>>

>>684965560

Good one.

>>

It's simple

>>

>>684967178

>anything else, thats too much work x30 kids

too much for them, or too much for you?

because if you mean too much for you, i can understand, it's very difficult to check homework, so much more time spent reading "x = -3/8" versus reading "x = 2"

>>

>>684964480

x = 0

or

x = -3

both work.

>>

>>684964988

Square functions have two solutions, one is obvious from the start (2*0Â²+6*0 = 0) and the other is easily derived by solving for x like with a linear function:

2xÂ²+6x = 0 | -6x

2xÂ² = -6x | /x

2x = -6 | /2

x = -6

>>

>>684968015

This

He's just a lazy cunt

>>

>>684966705

quadratic formula doesn't work for this instead you need to factorise the equation instead

>>

>>684966760

you nigger of course 0 isnt a solution after dividing by x, if it would you would divide by 0. doesnt mean its not a solution to the original problem.

>>

>>684966760

shithead idiot

>>

>>684967807

>starting Internet fights. Fucking keyboard warriors. Did your mommy not give you your doritos and mt. Dew this morning?

>>

>>684964480

6x^2+2x=0

6x^2=2x /:x

6x=2 /:2

3x=1

Im not sure about it(becaus 0 means that it is imposible and it has no answer) but this was in first year of higschool. Op is 15

>>

>>684967612

>>684968007

Finally some people with brains. DO this if you havent already lost all your bran cells for even having this thread open.

>>

>>684967561

>matlab

Like I said, crunching numbers.

Do you prove anything in matlab? No you don't.

>A compact Hausdorff-Space is normal, and thus regular.

^maths

>>

>>684967108

YOU DON'T PUT THE TIMES SIGN IN FRONT OF THE BRACKETS

WHAT ARE YOU PLAYING AT OP?!?

>>

>>684968169

>triggered

Go eat your chicken tendies

>>

>>684966760

>Tell me how zero is a solution again

Okay.

2*0Â²+6*0 = 0

That was beyond easy.

>>

>>684968178

You dumb asshole, you complete the square then factor.

>>

>>684967700

This

>>

>>684968178

Typo?

It's 2xÂ²+6x, not 6xÂ²+2x.

>>

>>684968286

Top fucking kek

How much do you actually use math in your job

>protip less than me because you're teaching children

If you had a respectable career you could possibly make some points but you don't.

On top of that you're a shitty one who wants to use brute force

>>

>>684968116

TIL: -6/2 == -6

>>

>>684968129

Just tested on graphics calculator,. works perfectly. its a quadratic, it can be factorised also. both viable options.

>>

>>684968559

Fuck. -3, of course.

>>

>>684964480

2x^2+6x=0

2x(x+3)=0

x=0, -3

>>

>>684968620

yeah I just noticed my mistake I accidently swapped a with c

sorry anon

>>

>>684968286

The reason we use matlab is to create visual models of biological systems

>make a real time temperature gradient cross section of a warming soda can with ambient temperature with t-step .01

Oh yeah you have to do it by hand or you're also crunching numbers

>>

>>684968511

>How much do you actually use math in your job

>protip less than me because you're teaching children

touchÃ©

>If you had a respectable career you could possibly make some points but you don't.

teaching is not a respectable career. ok. and yet they wonder why "kids these days" are spoiled brats. yeah. you're part of the problem m9

>On top of that you're a shitty one who wants to use brute force

>intentionally misreading me, AGAIN

if you could actually read, you could possibly make some points, but you don't.

>>

>>684968787

no problem.Atleast you know what your doing unlike 99% of this thread

>>

This one is easy, just factor out 2.

>>

I remember when this shit was difficult. I just finished calculus 3 this semester

>>

These are the 2 answers. 0 and -3 dont listen to the bait

>>

>>684969047

factor out 2x. 2x * x is 2x^2. 2x * 3 is 6x

>>

>>684968790

> >make a real time temperature gradient cross section of a warming soda can with ambient temperature with t-step .01

>maths

also

>you have to do it by hand or you're also crunching numbers

thats not what I said dummie. what I said (and say) is that either doing it by hand or with some fancy program, it's not maths. its visualizing your model (or whatever you were trying to do there)

>>

>>684969142

>>684968007

>>684967612

>>684966705

Use these op and any other people who want to understand basic maths

>>

>>684968129

Quadratic formula works. C is 0.

>>

>>684969150

Yes. Please excuse my mistake.

>>

Fuckin idiots

2x^2 +6x = 0

2x^2 = -6x

Devide by x

2x = -6

Devide by 2

x= -3 or x= 3

Fuckin morons

>>

>>

>>684964480

2x(x + 3)

X=0

X=-3

>>

>>684969432

bait/idiot

>>

>>684969299

Yeah but the quadratic formula is unnecessary as it takes up too much time when there is a far more easy method. Recognizing the simple factoring speeds the process to 2 steps.

>>

>>684969481

thx finally some1 whos not retarded

>>

>>684969432

Do not listen to this faggot. Square Root provides the +/- quality he's claiming, and he hasn't rooted the problem. This is bait.

>>

>>684969636

Shame I completely failed my c1 exam today

>>

Can someone explain how this works

>>

>>684969432

1- it would be written as x=+-3

2- x does not equal 3 and the only time it would be both the equal or the plus sign is if you square rout it

3- x equals 0 and -3

>>

>>684964617

>Thread

>>684964480

The expression OP is using is ax^2+bx+c=0, so we can conclude, that a=2, b=6 and c=0

We find d=b^2-4*a*c=6^2-4*2*0=36

>2 solutions

>x=(-6+sqrt(36))/(2*2)=0

>x=(-6-sqrt(36))/(2*2)=-3

>>

>dividing by X dora not change the result

2x=0

divide

2=0

Congrats, you broke it.

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