Question

Factor this expression completely 9x^2- y^2

Answer 1

(3x-y)(3x+y) is the answer to the question

Answer 2

(3x - y)(3x + y)

Explanation:

Both 9x^2 and y^2 are perfects squares.

The rule for factoring perfect squares is a^2 - b^2 = (a - b)(a + b).

Here, factoring (3x)^2 - y^2 results in (3x - y)(3x + y).