Question

cuanto es -81m2-17mn+15n2+20m2+3mn-17n2+53m2+18mn+7n2 AYUDA PLIS

Answer 1

Respuesta:

-81m2-17mn+15n2+20m2+3mn-17n2+53m2+18mn+7n2

Explicación paso a paso:

-81m^2-17mn+15n^2+20m^2+3mn-17n^2+53m^2+18mn+7n^2

=-81m^2+20m^2+53m^2-17mn+3mn+18mn+15n^2-17n^2+7n^2

=-8m^2-17mn+3mn+18mn+15n^2-17n^2+7n^2

=-8m^2+4mn+15n^2-17n^2+7n^2

=-8m^2+4mn+5n^2