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

Distribute each term in 5r − 4 across r² − 6r + 4: 5r(r² − 6r + 4) = 5r³ − 30r² + 20r, and −4(r² − 6r + 4) = −4r² + 24r − 16. Combine like terms to get 5r³ − 34r² + 44r − 16, which is choice A.

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