Question

допоможіть
1)5(a-2b)=
2)(2m-n)•(-r)=
3)3(n-5m)=
4)(2a+b)•(-c)=
​

Answer 1

1. 5(a-2b) = 5a - 10b
2. (2m-n)•(-r) = -2mr + nr
3. 3(n-5m) = 3n - 15m
4. (2a+b)•(-c) = -2ac - bc