Question

Factor the expression below x^2 - 81

A. (x + 9)(x - 9)
B. (x - 9)(x - 9)
C. (x + 27)(x - 3)
D. (x - 27)(x - 3)

Answer 1

A. (x + 9)(x - 9)

Solution:

(x + 9)(x - 9)

x²-9x+9x-81

x²-81

Answer 2

It's actually A. (x + 9) (x - 9)

Explanation: