Упрости: а) 3x•(-5y) б)4а•(-4b)

Question

Упрости: а) 3x•(-5y) б)4а•(-4b)

Answer 1

3х*(-5у)= -15ху
4а*(-4b)= -16ab

Answer 2

А)3x*(-5y)=(-5*3)xy= -15xy
б)4a*(-4b)=(-4*4)ab= -16ab