Respostas

2013-08-04T18:09:38-03:00
A) 4x² + 4x + 1
√4x² = 2x
√1 = 1  
(2x+1)²

b) y² - 14y +49
√y² = y
√49 = 7
(y - 7)²

c)25x² -60x +36
√25x² = 5x
√36 = 6
(5x-6)²

d) r² +2r +1
√r² = r
√1 = 1
(r+1)²

e) 100x² -80x +16
√100x² = 10x
√16 = 4
(10x - 4)²

f) x² + x + 1/4
√x² = x
√1/4 = 1/2
(x+1/2)²