Question

Which expressions are equivalent to (x^2 - 9) (x+3)

Answer 1

$( {x}^{2} - 9)(x + 3) \\ (x + 3)(x - 3)(x + 3) \\ (x + 3)^{2} (x - 3)$

Therefore the answer is A.

$( {x}^{2} - {y}^{2} ) = (x + y)(x - y)$

Here is the formula that is used for answering.