①(9x²y-6xy²)÷3xy ②(3x²y-xy²+2分之1xy)÷(-2分之1xy)

问题描述:

①(9x²y-6xy²)÷3xy ②(3x²y-xy²+2分之1xy)÷(-2分之1xy)

①(9x²y-6xy²)÷3xy=3x-2y
②(3x²y-xy²+2分之1xy)÷(-2分之1xy)=-6x+2y-1