## Algebra and Trigonometry 10th Edition

In $(3x+6)(3x-9)$, both factors have $3$ as a factor. The correct answer: $9x^2-9x-54=9(x+2)(x-3)$
$9x^2-9x-54=(3x+6)(3x-9)=3(x+2)3(x-3)=9(x+2)(x-3)$