Question

How do I expand the expression shown?

Answer 1

x² - x + 4x - 4 → D

Expand using the FOIL method

F → multiply First terms → x and x = x²

O → multiply the Outer terms → - 1 and x = - x

I → multiply the Inner terms → 4 and x = 4x

L → multiply the last terms → 4 and - 1 = - 4

(x + 4)(x - 1) = x² - x + 4x - 4