Question

dada a função f(x)=x-2(x+1) calcule f(0)

Answer 1

Percebamos:

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

O f(0) vale -2.