Question 153614
# 1


{{{f(x)=x^2-2x-7}}} Start with the given function.



{{{f(3)=(3)^2-2(3)-7}}} Plug in {{{x=3}}}.



{{{f(3)=9-2(3)-7}}} Square 3 to get 9



{{{f(3)=9-6-7}}} Multiply {{{-2}}} and {{{3}}} to get {{{-6}}}.



{{{f(3)=-4}}} Combine like terms.



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# 2




{{{f(x)=x^2-2x-7}}} Start with the given equation.



{{{f(-4)=(-4)^2-2(-4)-7}}} Plug in {{{x=-4}}}.



{{{f(-4)=16-2(-4)-7}}} Square {{{-4}}} to get {{{16}}}.



{{{f(-4)=16+8-7}}} Multiply {{{-2}}} and {{{-4}}} to get {{{8}}}.



{{{f(-4)=17}}} Combine like terms.