Question

X^2-9 can be factored using the formula

Answer 1

a^2 - b^2 = (a-b)(a+b)

Explanation:

x^2 -9

Rewriting as

x^2 - 3^2

We notice that this is the difference of squares

a^2 - b^2 = (a-b)(a+b)

x^2 - 3^2 = (x-3)(x+3)