Question

Dada a função f(x)= 4x-16, calcule o valor de x quando:

A) f(x)= 4

B) f(x)= -12

Answer 1

f(4)= 4.4-16
16-16=0

f(-12)= 4.(-12)-16
-48-16= -64

Answer 2

F(x)= 4×4-16=
F(x)= 16-16=0


F(x)=4×(-12)-16
F(x)=-48-16=-64