# How do you factor and solve x^2 – 9x = -20?

Aug 30, 2016

x = 5 & 4

#### Explanation:

${x}^{2}$ - 9x + 20 = 0
or, ${x}^{2}$ - 4x - 5x + 20 = 0
or, x (x - 4) - 5 (x - 4) = 0
or, (x - 4)(x - 5) = 0
or, x - 4 = 0, x - 5 = 0
or, x=4 & 5