Answer:
b² - 7b - 18
Step-by-step explanation:
To multiply the factors.
Each term in the second factor is multiplied by each term in the first factor, that is
b(b - 9) + 2(b - 9) ← distribute both parenthesis
= b² - 9b + 2b - 18 ← collect like terms
= b² - 7b - 18
