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