Question

Factor the following trinomial completely: 9x2 - 81
A. (3 x - 9)(3x + 9)
B. 3(x - 3)(x + 3)
C. 9(x - 3)^2
D. 9(x - 3)(x + 3)

Answer 1

@SolomonZelman

Answer 2

\[9x^2 - 81\]\[9x^2 - 9^2\]\[9(x^2 - 9)\]\[9(x^2 - 3^3)\]\[9(x-3)(x+3)\]

Answer 3

Hope this made some sense...

Answer 4

it's D