Respostas

2013-08-22T19:46:41-03:00
(d+a)²= d²+da+da+a² = d²+2d.a+a²
(x+5)²=x²+5x+5x+5²=x²+2.5.x+5²
(2+t)²=2²+2t+2t+t²=2²+2.2t+t²
(m+4)²=m²+4m+4m+4²=m²+2.4m+4²
(b+9)²=b²+9b+9b+9²=b²+2.9b+9²
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