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GenaCL600 [577]
4 years ago
10

Multiply the polynomials (5x^2+2x+8)(7x-6)

Mathematics
2 answers:
zysi [14]4 years ago
6 0
                 5x^2 + 2x + 8
                <u> x          7x - 6
</u>             -30x^2 - 12x -48
<u>35x^3 + 14x^2 + 56x + 0</u>
35x^3 - 16x^2 + 44x - 48
babunello [35]4 years ago
5 0

Answer:

35x^{3}+14x^{2} +56x-30x^{2} -12x-48\\35x^{3}-16x^{2} +44x -48\\

Step-by-step explanation:

In order to multiply you just have to go term by term, you just first multiply 7x by the whole trinomial:

(5x^{2} +2x+8)(7x)=35x^{3}+14x^{2} +56x

ANd then you multiply the second term: -6

(5x^{2} +2x+8)(-6)=-30x^{2} -12x-48

ANd now you just have to add them up together:

35x^{3}+14x^{2} +56x\\

         -30x^{2} -12x-48

And this would be equal to:

35x^{3}-16x^{2} +44x -48

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