Find the Sum f(x)=-x^2 , g(x)=4x-x^2

$f (x) = - x^{2}$ , $g (x) = 4 x - x^{2}$

Replace the function designators with the actual functions in $f (x) + g (x)$ .

$- x^{2} + 4 x - x^{2}$

Subtract $x^{2}$ from $- x^{2}$ .

$- 2 x^{2} + 4 x$

Find the Sum f(x)=-x^2 , g(x)=4x-x^2

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