(3x^2y-xy^2+二分之一xy)÷(-二分之一xy)

问题描述:

(3x^2y-xy^2+二分之一xy)÷(-二分之一xy)

(3x²y-xy²+xy/2)÷(-xy/2)
=-2(3x-y+1/2)
=-6x+2y-1