Answer:
x² - 16x + 64
Step-by-step explanation:
(x - 8)² = (x - 8)(x - 8)
Each term in the second factor is multiplied by each term in the first factor , that is
x(x - 8) - 8 (x - 8) ← distribute parenthesis
= x² - 8x - 8x + 64 ← collect like terms
= x² - 16x + 64
