Question

спростіть вираз
1)-2,4m*(-3n)=
2)-8a-12b+5a+17b=
3)-5(y-4)+2(y+5)=

Answer 1

1)-2.4m(-3n)=7.2mn; 2)-8a-12b+5a+17b=-3a+5b ;3)-5(y-4)+2(y+5)=-4y+20+2y+10=-2y+30