>in precalculus with other muck-dwelling brainlet scum >in

>>8315481
fucking awful bait

>>8315481
x^-2 = 9
(x^-2)^2 = 9^2
x = 9^2
x = 1/81

>>8315547
bravo

>>8315481
fyi
[math] x^{-y} = \frac{1}{x^{y}} [/math]
>I'm tooootally not just practicing LaTeX (I am)

>>8315547
No

x^-2=9
1/(x^2)=9
1=9x^2
1/9=x^2
x=1/81

>>8315481
I hope you're a freshman

>>8315481
x^-2 = 9
1/x^2 = 9
1/9 = x^2
sqrt(1/9) = sqrt(x^2)
1/3 = x

>>8315552
>why the fuck you be talking like this bro

>>8315547
>(x^-2)^2 = 9^2
>x = 9^2
Bruh.

Powers don't fucking work that way. Learn some fucking arithmethic before you come here posting shit.

Your friends are also retarded I mean god damn. Well, what did I expect. You are doing fucking pre-calc.

Do you know algebraically what negative exponents mean right?

>>8315552
[math]x^{-2} = 9[/math]
[math]\frac{1}{x^{2}} = 9[/math]
[math]\sqrt{x^{2}} = \sqrt{\frac{1}{9}}[/math]
[math]x = \frac{1}{3}[/math]

>>8315481
Don't worry they're brainlets too, the answer is [math] x=\frac{1}{3}[/math]

>>8315570
Don't fucking solve it for him man. I wanted OP to drown in his stupidity.

>>8315562
That was the only thing you noticed that was wrong with it?

>>8315585
Well, there is a mistake after that aswell but the first problem is that he can't into exponents.

>>8315583
;) Don't worry about it. I didn't include the [math]x^2 = \frac{1}{9}[/math] step.

>>8315481
>Pre calculus
Underage b&?

>>8315547
No, it's +/-(1/81)

X^-2 = 9
X^2 = 1/9
Sqrt(X^2) = sqrt(1/9)
X = 1/3

>>8315547
That makes x^-4 = 1/81

>>8315481
Answer is 1/3 you idiot.

>>8315481
Answer is +- (1/3 ) what the fuck you babbling about anon?

>>8317298
>>8317256
>>8315570
>>8315558
Surely you guys aren't actually this retarded.

>>8317728
what the fuck is it then Einstein

>>8317769
[eqn] \pm \frac{1}{3} [/eqn]

>insulting other people whole doing precalc

better cut that smugness in the bud now otherwise you're never going to learn seriously