Question

dada a função f(x) = x² + 4 determine f(2) e f(3)

Answer 1

$f(x)= x^{2} +4 \\ \\ \\ f(2)=x^{2} +4 \\ f(2)= 2^{2} +4 \\ f(2)=4+4 \\ f(2)=8 \\ \\ \\ \\ f(3)=x^{2} +4 \\ f(3)=3^{2} +4 \\ f(3)=9 +4 \\ f(3)=13$