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11 April, 17:29

What is the product? (5r - 4) (r2 - 6r + 4)

A. 5r3 - 34r2 + 44r - 16

B. 5r3 - 4r2 + 14r - 16

C. 5r3 - 6r - 16

D. 5r3 + 10r - 16

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  1. 11 April, 21:09
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    (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.
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