Respostas

2013-07-23T21:02:40-03:00
M³ + n³ = (m + n)(m² – mn + n²)
m³-m²n+mn² = m(m² – mn + n²)

(m³+n³)/m³-m²n+mn²= [(m + n)(m² – mn + n²)]/m(m² – mn + n²)
= (m+n)/m