Question

Find the expression if g(x)=x^2+2x:
g(3)+g(7)

Answer 1

g(3)=(3)^2+2(3)=9+6=15
g(7)=(7)^2+2(7)=49+14=63
so 63+15=78

Answer 2

\[[3^{2}+2(3)]+[7^{2}+2(7)]\]
\[[9+6]+[49+14]\]
\[15+63\]
\[78\]