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