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