Докажите дождества! a (b-c)=-a (c-b)

Question

Докажите дождества! a (b-c)=-a (c-b)

Answer 1

A(b-c)=ab-ac=-a(c-b)

Answer 2

А(b-c)= -a (c-b)
ab-ac = -ac +ab
ab-ac= ab -ac