Respostas

  • Ind
  • Ambicioso
2014-02-12T17:42:11-02:00
(a + b) ² = a² + 2ab +b²

a =  \frac{x}{2} e b =  \frac{y}{2}

  (\frac{x}{2} )^{2} + 2.( \frac{x}{2} ).( \frac{y}{2} ) + ( \frac{y}{2})^{2}

 \frac{ x^{2} }{4} +  \frac{2.x.y}{4} +   \frac{ y^{2} }{4}
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