Помогите ! (2х-у+3)×(-2) (3m-2n+p)×(-1) (a+5-b-c)×m
(2х-у+3)×(-2)=-4х+2у-6 (3m-2n+p)×(-1)=-3m+2n-p (a+5-b-c)×m=am+5m-bm-cm