10-05-2016
Mathematics

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f(x) = −5x2 − x + 20, find f(3).

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apologiabiology apologiabiology

10-05-2016

sub 3 for x
f(3)=-5(3)^2-(3)+20
f(3)=-5(9)-3+20
f(3)=-45+17
f(3)=-28

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