Answer:
x³ - 5x² + 4x
Step-by-step explanation:
Given
x(x - 4)(x - 1) ← expand (x - 4)(x - 1) using FOIL
= x(x² - x - 4x + 4)
= x(x² - 5x + 4) ← distribute
= x³ - 5x² + 4x
