Question

помогите пожалуйста 2×(a+3b-7c); -3×(-4b+3p-11c); (a-4d+3p)×(-8)

Answer 1

1) 2·(a+3b-7c)=2a+3b·2-7c·2=2a+6b-14c.
2) -3·(-4b+3p-11c)=-3·(-4b)+(-3)·3p-(-3)·11c=12b-9p+33c.
3) (a-4d+3p)·(-8)=-a·8-4d·(-8)-3p·8=-8a+32d-24p.