Let f(x)=2x+1 and g(x)=x^2-1 find each value (fog)(2)

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In general whatever the value of "f" or "g" is you replace the variable in the parentheses with that value. I'm not sure what (fog)(2) means here, but let's assume it means that both "f" and "g" are equal to 2:f(x)= 2x+1f(x)= 2(2) +1f(x) = 5and for g(x):g(x)=(2)^2 -1g(x)=4-1g(x)=3hope it helps,Kamel