Question

Can someone check my work??

(2x-7)^2\

I got: -24x+49

Answer 1

Ignore the Slash

Answer 2

how did you get the -24?

Answer 3

I foiled

Answer 4

That's 'foiling' right? try it one more time...

Answer 5

you also don't have a squared term..

Answer 6

so we do
2x * 2x... =?
2x * -7... =?
-7 * 2x... =?
-7 * -7... =?

Answer 7

4x

Answer 8

and -14 for the middle two

Answer 9

When you multiply 2 'x' numbers....the x becomes squared....
2x * 2x = 4x²

Answer 10

Oh yes right

Answer 11

and when you multiply a constant times an 'x' number...you multiply the numbers...but keep the x

2x * -7 = -14x right?

Answer 12

yeah

Answer 13

and then just the -7 times -7 is?

Answer 14

49

Answer 15

Right ...so altogether you have

4x² - 14x - 14x + 49

or

4x² - 28x + 49

right?

Answer 16

ok I see what I did wrong

Answer 17

There you go :)

Answer 18

Thank you
:)

Answer 19

anytime!