Answer :
Answer:
Choice A
Step-by-step explanation:
(5r - 4)(r² - 6r + 4)
distributive property of multiplication.
5r(r² - 6r + 4) - 4(r² - 6r + 4)
5r³ - 30r² + 20r - 4r² + 24r - 16
group like terms and simplify.
5r³ - 30r² - 4r² + 20r + 24r - 16
5r³ - 34r² + 44r - 16
Choice A.