Question

\[x ^{2}-2(3-x ^{2})\]

Explain how you got your answer too :)

Answer 1

http://www.wolframalpha.com/input/?i=x2%E2%88%922%283%E2%88%92x2%29

Answer 2

??

Answer 3

?

Answer 4

what did they do?

Answer 5

are you trying to simplify it?

Answer 6

what were the steps they took to get 3x^2-6

Answer 7

they factored it i believe

Answer 8

how?

Answer 9

kind of hard to explain

Answer 10

@romoore: the fact that you can't explain it says everything we need to know about why using Wolframalpha is a bad substitute for thinking.

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

Answer 11

thanks!