NEED HELP ASAP!!!!! Simplify: 21. (-y + 4)(2y - 1)

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NEED HELP ASAP!!!!! Simplify: 21. (-y + 4)(2y - 1)

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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is there multiple choice?
Yes. A. 2y^2 + 7y + 3 B. 2y^2 + 5y - 4 C. -2y^2 + 9y - 4 D. -2y^2 + 6y + 3
Well, what I usually do is I replace the "y" with a number (5 usually). Then I solve the problem and the multiple choices. If one of the multiple choices matches the problem then that is the answer. If that is too confusing then I will explain it better. :)

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Please explain.
Ok. Write down the problem on paper, but replace the "y" with the number 5.
(-5 + 4)(2*5 - 1)
Good! Now I believe you can solve this, right?
Not really. Having to do three things at once. But would the answer be C?
I will check.
Yes, the answer is C. Great Job!! :)
Thank you for all your help. You have been more than helpful.
Aww. You're welcome! Technically speaking you found the answer! ;)

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