Respostas

2013-08-04T22:37:31-03:00
(1+m)² +(1-m)² +(-1+m)² +(-1-m)² =
m²+2m+1+m²-2m+1+m²-2m+1+m²+2m+1=
4m²+4=
4(m²+1)

      (2a+1)² +(2a-1)² -2(2a-1)+(2a-1) 
4a²+4a+1+4a²-4a+1-4a+2+2a-1=
8
a²-2a+3
2a(4a-1)+3


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