Respostas

  • Usuário do Brainly
2014-09-02T22:59:10-03:00
(10x-4y)²= (10x)²-2.10.4y+(4y)²=

\fbox{$100x^2-80xy+16y^2$}
  • Usuário do Brainly
2014-09-02T23:59:45-03:00
(10x - 4y)² = 100x² - 8oxy + 16y²