What is the product of the polynomials below? (5x²-x-3)(2x+6) OA. 10x² +28x² +12x+3 OB. 10x³ +28x2² -12x-18 OC. 10x²+28x²-12x-3 OD. 10x² +28x² + 12x+18

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asked Nov 8, 2023 192k views

7 votes

What is the product of the polynomials below?

(5x²-x-3)(2x+6)
OA. 10x² +28x² +12x+3
OB. 10x³ +28x2² -12x-18
OC. 10x²+28x²-12x-3
OD. 10x² +28x² + 12x+18

Mathematics
college

Oush asked

by Oush

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1 Answer

11 votes

Answer: B

Explanation:

$(5x^2 -x-3)(2x+6)\\\\=2x(5x^2 - x-3)+6(5x^2 - x-3)\\\\=10x^3 - 2x^2 - 6x+30x^2 - 6x-18\\\\=\boxed{10x^3 +28x^2 - 12x-18}$

Geoffrey H answered Nov 15, 2023

by Geoffrey H

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