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?
Kylie is wrong about the result since (–4x + 9)2 will result to a perfect square trinomal. Any binomial squared will always result to a perfect square trinomial.
And the expansion of the expression should be (–4x + 9)2 = (-4x)2 + 2(-4x)(9) + 9^2 (–4x + 9)2 = 16x2 - 72x + 18
She missed doing the middle term in doing the multiplication
