Question

Factor completely 121x2 − 16. (11x − 4)(11x + 4) (11x − 4)(11x − 4) (4x − 11)(4x − 11) (4x − 11)(4x + 11)

Answer 1

(4x − 11)(4x + 11)

Explanation:

I got it correct on my test

Answer 2

(11x+4)(11x-4)

Explanation:

Since both terms are perfect squares, factor using the difference of squares formula, a2−b2=(a+b)(a−b) where a=11x and b=4.