Question

Factor the expression below.
x2 - 49

Answer 1

(x+7)(x-7)

Explanation:

These are perfect squares. Whenever you have perfect squares, you can take the square root of the constant. The constant is 49 in this case. The square root of 49 is + or - 7. Therefore, you get (x+7) and (x-7) as solutions. Factored form is (x+7)(x-7).

Answer 2

(x+7) (x-7)

Because: the difference of two squares.