3b(a-b)=3ab-3b^2
-5(0.8c-0.9d)=-4c+4.5d
-1(3x-4y)=-3x+4y
7m(m-n-p)=7m^2-7mn-7mp
-0.3(-5a-3c-2d)=1.5a+0.9c+0.6d
5(-4x-6y-3)=-20x-30y-15
3b(a-b)=3ab-3b^2
-5(0.8c-0.9d)=-4c+4.5d
-1(3x-4y)=-3x+4y
7m(m-n-p)=7m^2-7mn-7mp
-0.3(-5a-3c-2d)=1.5a+0.9c+0.6d
5(-4x-6y-3)=-20x-30y-15