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Please explain how you got the answer

Please explain how you got the answer-example-1

2 Answers

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The answer is −2y^2 + 9y − 4

I simplified by multiplying -y and 2y, 4 and 2, 2y and 1, and -y and -1 which simplified again is the answer above.
User XzKto
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\bf (-y+4)(2y-1)\implies \stackrel{(-y)(2y-1)}{-2y^2+y}~~+~~\stackrel{(4)(2y-1)}{8y-4}\implies -2y^2+9y-4

notice, just like in any multiplication, you can simply multiply each term of either polynomial times the other, sum them up and then cancel like-terms.
User Lyzbeth
by
8.3k points

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