Question

(2x + 20) (2x +24) =672
How to solve for x? :/

Answer 1

First foil (2x+20)(2x+24). What did you get?

Answer 2

2x^2 + 48x + 40x + 800

Answer 3

@ryan88 Am I right?

Answer 4

Check your work, first and last numbers are wrong

Answer 5

4x and 480

Answer 6

4x^2, right. So if you simplify it

You get 4x^2+88x+480 = 672. We need to get it in form so we can factor it, so lets subtract 672 from both sides

That gives us 4x^2+88x-192. Now you can just factor that. What did you get?

Answer 7

4( x + 24) (x-2)

Answer 8

@Ryan88 this is right?