How do you factor x^ { 2} - 20x = - 125?

1 Answer
Dec 17, 2016

(x+5)(x-20)=0

Explanation:

x^2-20x=-125

->x^2-20x+125=0
->x^2+5x-20x+125=0 (See this video for how this happened - Factoring quadratics)
->x(x+5)-20(x+5)=0
->(x+5)(x-20)=0