Respostas

2015-01-02T09:41:52-02:00
A² x = a ( x + 2 ) - 2
a² x = ax + 2a - 2
a .a.x = a.x + 2a - 2
a = 2a - 2
-2a + a = -2
a = -2

(-2)² x = -2 (x +2) - 2
4x = - 2x - 4 - 2
4x + 2x = - 6
6x = - 6
x = - 1

(-2)² .-1 = -2 (-1 + 2 ) - 2
-4 = 2 -4-2
-4 = -4