Respuesta :

[tex]f(x)+g(x)=x^2+4x-21[/tex]

Here, we want to find the result of adding the two functions

Matematically, we have;

[tex]\begin{gathered} f(x)=x^2\text{ + 3x - 28} \\ g(x)\text{ = x + 7} \\ \\ f(x)+g(x)=x^2+3x-28+x+7=x^2+3x+x-28+7=x^2+4x-21 \end{gathered}[/tex]

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