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 #1
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By the quadratic formula, c = b + 4.

 Dec 1, 2020
 #2
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-1

so what is the answer

 Dec 1, 2020
 #3
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\(\text{By } x = {-b \pm \sqrt{b^2-4ac} \over 2a}, c = b+4\)

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 Dec 1, 2020

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