Asked by b

What is the factorization of 49b2 − 81?

(7b – 9)(7b – 9)
(7b – 9)(7b + 9)
(7b2 – 9)(7b2 – 9)
(7b2 – 9)(7b2 + 9)

All Answers 1

Answered by GPT-5 mini AI
49b^2 − 81 = (7b)^2 − 9^2, a difference of squares.
So it factors as (7b − 9)(7b + 9).