# How do you factor by grouping x^3-x^2-4x+4?

Jun 10, 2015

factor: f(x) = x^3 - x^2 - 4x + 4

#### Explanation:

f(x) = x^3 - 4x - x^2 + 4

f(x) = x(x^2 - 4) - (x^2 - 4) = (x^2 - 4)(x - 1) = (x - 2)(x + 2)( x - 1)