Question

(b) Factorize: x2 - 49

Answer 1

(x-7)(x+7)

Explanation:

x^2 = x * x

-49 = -7 * 7

(x-7)(x+7)

Answer 2

(x+7)(x-7)

Explanation:

This one has the standard shape of a²-b², therefore its factorization is (a+b)(a-b).