Question

Kylie explained that (–4x + 9)2 will result in a difference of squares because (–4x + 9)2 = (–4x)2 + (9)2 = 16x2 + 81. Which statement best describes Kylie’s explanation?

Answer 1

I hope this helps you

Answer 2

Answer:

-72x is missing in Kylie's work

Step-by-step explanation:

Kylie explained that $(-4x + 9)^2$ will result in a difference of squares because $(-4x + 9)^2 = (-4x)^2 + (9)^2 = 16x^2 + 81$

LEts expand $(-4x + 9)^2$  and check

$(-4x + 9)(-4x+9)$  

Apply FOIL method to multiply it

$16x^2-36x -36x+81$  

Combine like terms

$16x^2-72x+81$  

The final expression will not result in difference of squares

Because we are multiplying the same terms

-72x is missing in Kylie's work