Question

Multiply. (Simplify your answer completely.) (a) (a - b)²

Answer 1

a² - 2ab + b²

Explanation:

given

(a - b)²

= (a - b)(a - b)

each term in the second factor is multiplied by each term in the first factor

a(a - b) - b(a - b) ← distribute parenthesis

= a² - ab - ab + b² ← collect like terms

= a² + b²