can't seem to figure this out

>>9078809
Fuck off highschooler.

conjugate
back to classroom

This is a routine problem of the sort you should learn how to do in class.

Multiply the top and bottom by the complex conjugate

>>9078809
this >>9078840

really easy, got 780 on math sat

What you need to know is when you multiply a complex number by it's conjugate, you get a real number

If you multiplied this by the conjugate of the denominator, you would get a rational +/- a rational times i

File: 20170802_015559.jpg (3MB, 2160x2160px) Image search: [Google]

3MB, 2160x2160px

A. Don't ask me how I figure it out.

>>9078819
Maybe he is just young, but you're advise is correct and a=2

convert to trig form.

>>9078809
>8 replies
How has this thread lasted this long? This belongs in >>>/sci/sqt

There's nothing to be discussed here, so it doesn't warrant its own thread.

>>9079012
(8/sqauredroot13)(cos(-7.125degrees-(-33.69)degrees)+isin(-7.125degrees-(-33.69)degrees)

File: sage.jpg (23KB, 700x466px) Image search: [Google]

23KB, 700x466px

>>9079013
The people here thrive on feeling intellectually superior, and this is a problem that everyone can do, so everyone in the thread can feel smart by either answering the question or talking down to the questioner.

Plus, not everyone here grasps the concept of sage.

you can easily look this up on google and dick around with wolframalpha, OP is just being lazy