Question

Solve by factoring. x2 - 49 = 0

Answer 1

Remember
difference of 2 perfect squares
a^2-b^2=(a-b)(a+b)

(x)^2-(7)^2=(x-7)(x+7)

set to zero
x-7=0
x=7

x+7=0
x=-7

x=-7 or 7