Respostas

  • Usuário do Brainly
2014-08-15T14:41:22-03:00
Temos que, (a-b)^2=a^2-2ab+b^2.

Assim, (mn-m^2n)^2=(mn)^2-2\cdot(mn)\cdot(m^2n)+(m^2n)^2.

Logo, (mn-m^2n)^2=m^2n^2-2m^3n^2+m^4n^2.
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