Respostas

2014-02-01T18:18:17-02:00
(x+1)²+(x+2)²-1*(2x-1)
(x²+2*x*1+1²)+(x²+2*x*2+2²)-2x+1
x²+2x+1+x²+4x+4-2x+1
2x²+4x+6

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2014-02-01T18:18:32-02:00
X+1 ao 2 = X^2+2x+1
X+2 ao 2 = x^2+4x+4
-2x-1
=
2x^2+4x+6
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