$$f(x)=x(x+3)$$

The function $f$ is defined above. If the function $g$ is defined by $g(x)=f(x)-5$, what is the value of $g(2)$?

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Since $g(x)=f(x)-5$ and $f(x)=x(x+3)$,

$$g(x)=x(x+3)-5$$

To find $g(2)$, simply plug in 2 where there is a $x$.

$$g(2)=2(2+3)-5$$ $$=2(5)-5$$ $$=10-5$$ $$=\boxed{5 }$$