Question

How do you factor `x^ { 2} - 9x + 20`?

Answer 1

x = 5 , 4

Explanation:

`x^2` - 9x + 20

= `x^2` -5x - 4x +20

= x(x - 5) -4(x - 5)

= (x - 5)(x - 4)

∴ x = 5 , 4