Answer:
x² - 14x + 40
Step-by-step explanation:
(x - 10)(x - 4)
Each term in the second factor is multiplied by each term in the first factor, that is
x(x - 4) - 10(x - 4) ← distribute parenthesis
= x² - 4x - 10x + 40 ← collect like terms
= x² - 14x + 40
