Question

Considere as funções f(x) = 5x + 12 e g(x) = 3x – 6. Calculando f(1) – g(1), obtem:

Answer 1

$f(x)=5x+12\\g(x)=3x-6$

$f(1)=5\cdot1+12\\f(1)=5+12\\f(1)=17$

$g(1)=3\cdot 1-6\\g(1)=3-6\\g(1)=-3$

$f(1)-g(1)=17-(-3)=17+3=20$