1.3a(5a-2b) 2.(x-3y)(-6x) 3.化简x(x-1)+2x(x+1)-

问题描述:

1.3a(5a-2b) 2.(x-3y)(-6x) 3.化简x(x-1)+2x(x+1)-
1.3a(5a-2b) 2.(x-3y)(-6x)
3.化简x(x-1)+2x(x+1)-3x(2x-5).

15a²-6ab-6x²_18xyx²-x+2x²+2x_6x²+15x=-3x²+16x=_3x(x_16/3)