patsfan89 patsfan89

22-07-2018
Mathematics

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let f(x) = -3x - 1 and g(x) = x2 + 4. find (f•g)(-4) then (f•g)(-4) =

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konrad509 konrad509

22-07-2018

[tex] (f \cdot g)(x)=(-3x-1)(x^2+4)=-3x^3-12x-x^2-4\\\\
(f \cdot g)(-4)=-3\cdot(-4)^3-12\cdot(-4)-(-4)^2-4=192+48-16-4=220 [/tex]

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