Question

Dada a função f(x)=2x-4 determine:
a= f(0)
b=f(2)
c=f(-3)

Answer 1

A- 0=2x-4
2x=-4
x= \frac{-4}{2} 
x=-2
B- 2=2x-4
2+4=2x
6=2x
x= \frac{6}{2} 
x=3
C- -3=2x-4
-3+4=2x
1=2x
x= \frac{1}{2} 

Answer 2

f(0) = 2x0-4 = -4
f(2)= 2x2-4=0
f(-3)= 2x(-3)-4= -10