Respuesta :

[tex]\begin{gathered} g\mleft(x\mright)=5x+7 \\ h\mleft(x\mright)=x+2 \\ (h\cdot g)(x)=(x+2)(5x+7)\Rightarrow x(5x+7)+2(5x+7) \\ (h\cdot g)(x)=5x^2+7x+10x+14 \\ (h\cdot g)(x)=5x^2+17x+14 \end{gathered}[/tex]