Question

X² – 9
x² - 2x - 15
Simplify

Answer 1

x^2 - 9 = (x + 3)(x - 3) = (x - 0)^2 - 9.

x^2 - 2x - 15 = (x - 5)(x + 3) = (x - 1)^2 - 16.

I assume you mean factored form?