Question

If possible, factor 169x^2 − y^2.

Answer 1

(13x - y)(13x + y)

Explanation:

Both 169x^2 and y^2 are perfect squares.

The (special) rule for factoring the difference of two squares is

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

Therefore, 169x^2 and y^2 = (13x - y)(13x + y)