Respostas

2013-12-08T22:34:18-02:00
A) f(x) = x + 5
    x + 5 = 0
    x = -5
b) f(x) = x
  x = 0
c) f (x) = 2 - x
      2 - x = 0
        - x = -2
          x = 2
2013-12-08T23:40:04-02:00
X+5=0
X= -5

X=0


2 - X = 0
-X= - 2 (-1)
X=2

ESPERO TER AJUDADO, OK!!!