if N→N f(x)=3x+2 g:N→N g(x)=x²-3
Find g(5),f(4)
f(x)=3x+2
f(4)=3*4+2
f(4)=14
g(x)=x2-3
g(5)=52-3
g(5)=25-3
g(5)=22