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14-02-2018
Mathematics

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What is the product of the polynomials below?

(7x2 + 5x + 7)(4x - 6)

A. 28x3 - 62x2 - 2x - 42
B. 28x3 - 22x2 - 58x - 42
C. 28x3 - 22x2 - 2x + 42
D. 28x3 - 22x2 - 2x - 42

Respuesta :

Аноним Аноним

19-02-2018

(7x2 + 5x + 7)(4x - 6)
= 28x^3 - 42x^2 + 20x - 30x + 28x - 42
= 28x^3 - 22x^2 - 2x - 42

It's D

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