Question

I need help! Please help me and I don’t what is answer this question!

Answer 1

`f(x)=x^2+2x\hspace{5em}g(x)=x+4 \\\\\\ (f\circ g)(2)\implies f(~~g(2)~~)\hspace{5em}(g\circ f)(2)\implies g(~~f(2)~~) \\\\[-0.35em] ~\dotfill\\\\ g(2)=(2)+4\implies g(2)=6 \\\\\\ f(~~g(2)~~)\implies f(6)\implies (6)^2+2(6)\implies \text{\LARGE 48} \\\\[-0.35em] ~\dotfill\\\\ f(2)=(2)^2+2(2)\implies f(2)=8 \\\\\\ g(~~f(2)~~)\implies g(8)\implies (8)+4\implies \text{\LARGE 12}`