Question

Раскройте скобки и упростите выражение:
3m-(2m-3) (2-m)=
(3y-1)-(2y-2)+(y-3)=

Answer 1

1) $3m-(2m-3)(2-m)=3m-(4m-2m^2-6+3m)=3m-4m+2m^2+6-3m=2m^2-4m+6=m^2-2m+3$
2) $(3y-1)-(2y-2)+(y-3)=3y-1-2y+2+y-3=2y-4=y-2$