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