Question

How do you factor x squared minus 100

Answer 1

Rewrite 100 as 10 ^2 . x^ 2 − 10 ^2

Since both terms are perfect squares, factor using the difference of squares formula, a^2 -b^2= (a + b) (a - b) where a = x and b = 10.

(x + 10) (x - 10)