Respostas

2013-12-02T13:14:08-02:00
A)y=(x-2)²
(x-2)² = (x - 2)*(x - 2) = 0
x -2 = 0; x = 2
b)y=(x+2)²
(x+2)² = (x + 2)*(x + 2) = 0
x +2 = 0; x =- 2
c)y=(x-3)²
(x-3)² = (x - 3)*(x - 3) = 0
x - 3 = 0; x = 3
d)y=(x+3)²
(x+3)² = (x+3)² = (x + 3)*(x + 3) = 0
x + 3 = 0; x = -3
Até mais !
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