Answers

2014-06-12T12:45:29+08:00
[(x+3)-5]^2
= [3x - 5]^2
= -2x^2
= 4x^2
1 5 1
2014-06-12T13:47:05+08:00
((x+3)-5))^2
(x-2)^2
(x-2)(x-2)
x^2-2x-2x+4
x^2 - 4x + 4
0