Respostas

2013-08-08T11:02:20-03:00
(x-3)2=0 ? se for assim, temos que:
2x-6=0
2x=6
x=6/2
x=3

b) (4+y)2=0 <=> 8+2y=0 <=> 2y=-8 <=> y=-8/2 <=> y=-4

c) (2x-5)2=0 <=> 4x-10=0 <=> 4x=10 <=> x=10/4 <=> x=5/2 OU x=2,5
2013-08-08T11:17:03-03:00
A) (x-3)2
2x-6
2x=6
x=6/2
x= 3

B)
(4+y)2

8+2y=0
2y=-8
y= -8/2
y= -4

C) (2x-5)2
4x-10=0
4x=10
x=10/4
simplificando 10/2  4/2
vai ficar assim:
x= 5/2