Question

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

Answer 1

`(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`