(7m^2n^2 -mn^2 +5m^2n) + (3mn^2 -4m^2 n^2 +10m^2n) (7m^2n^2 -mn^2 +5m^2n)минус (3mn^2...

Question

(7m^2n^2 -mn^2 +5m^2n) + (3mn^2 -4m^2 n^2 +10m^2n)
(7m^2n^2 -mn^2 +5m^2n)минус (3mn^2 -4m^2 n^2 +10m^2n)
Помогите решить!!
Сложение и вычитание многочленов.

Answer 1

1)
mn(7mn-n+5m) + mn (3n-4mn+10m) = mn(7mn-n+5mn+3n-4mn+10mn) = mn(3mn-2n+15m)

2) mn(7mn-n+5m) - mn (3n-4mn+10m) = mn(7mn-n+5m-3n+4mn-10m) = mn(11mn - 4n - 5m)