Question

Considere a funcão f(x)= - 2x + 2. Qual o valor de f(1) - f(0) ?

Answer 1

Basta substituir o X pelos valores indicados.
f(1) = -2 * 1 + 2             
f(1) = -2 + 2
f(1) = 0

f(0) = -2 * 0 + 2
f(0) = 0 + 2
f(0) = 2

f(1) - f(0)
0 - 2 = -2

Answer 2

f(x) = - 2x + 2. 

f(1) = - 2.(1) + 2
f(1) = - 2 + 2
f(1) = 0

f(0) = - 2.0 + 2
f(0) = 2
*******************************
= f(1) - f(0)
= 0 - 2
= - 2 

R.:  - 2