Question

o volume de um cubo cuja a aresta mede (x + 2y)

Answer 1

Volume  =  aresta³

V = a³

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$V = a^3 \\ \\ V = (x + 2y)^3 \\ \\ \\ V = (x + 2y)*(x + 2y)*(x + 2y) \\ \\ V = (x + 2y) (x^2 + 4xy +4y^2) \\ \\ => V = x^3 + 6x^2y + 12xy^2 + 8y^3$