babygirlpink199 babygirlpink199

28-09-2014
Mathematics

Answered

Let f(x) = x - 2 and g(x) = x2 - 7x - 9. Find f(g(-1)).

Answer :

konrad509 konrad509

28-09-2014

[tex]f(g(-1))=(-1)^2-7\cdot(-1)-9-2=1+7-11=-3[/tex]

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28-09-2014

[tex]f(x)=x-2\\\\ g(x)=x^2-7x-9\\\\ f(g(-1)):\\ First\ calculate\ g(-1):\\\\ g(-1)=(-1)^2-7*(-1)-9=1+7-9=8-9=-1\\\\\ f(-1)=-1-2=-3\\\\ \boxed{f(g(-1))=-3}[/tex]

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