Question

выполните действие:
1) (-4а)*(-5b)
2) 3/4a*(-2/3x)
3) (-3a)*2b*(-c)

Answer 1

1) (-4а)*(-5b)=20ab 2) 3/4a*(-2/3x)=-1/2ax 3) (-3a)*2b*(-c)=6abc