Question

For f(x)=2x+1 and g(x)=x^2-7, find (f-g)(x).

Answer 1

Answer:

$(f-g)(x)=-x^{2}+2x+8$

Step-by-step explanation:

$\left( f-g\right) \left( x\right) =f\left( x\right) -g\left( x\right)$

                $=2x+1-\left( x^{2}-7\right)$

                $=2x+1-x^{2}+7$

                $=-x^{2}+2x+8$