-3m^2n/5+m^2n-mn^2烦,做不出来2(x-1)-3(2-3x)

问题描述:

-3m^2n/5+m^2n-mn^2
烦,做不出来
2(x-1)-3(2-3x)

-3m^2n/5+m^2n-mn^2
=(1-3/5)m^2n-mn^2
=(3/5)m²n-mn²
2(x-1)-3(2-3x)
=2x-2-6+9x
=11x-8