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