Question

Solve by graphing.

x^2 +2x - 8 = 0

Answer 1

Do you know how to factor it?

Answer 2

no can you show me

Answer 3

Do you have to graph it and find the roots?

Answer 4

yes

Answer 5

Okay...to find the roots let's begin...it's kind of complicated to explain but i'll try :)

Answer 6

ok

Answer 7

First if we look at the function we only see 3 things (pretend the 0 isn't there) The three "things" are x^2, 2x and -8....We have to make it into 4 things because you can't factor out 3 things...

Answer 8

Then let's start!

Answer 9

ok

Answer 10

So first you have to multiply x^2 and -8 and you will get -8x^2...now what numbers can you multiply to get 8?