作业帮x^2+xy分之x-y 除以x^2y^2-x^4分之xy-x^2*x-y分之1
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x^2+xy分之x-y 除以x^2y^2-x^4分之xy-x^2*x-y分之1
x^2+xy分之x-y 除以x^2y^2-x^4分之xy-x^2*x-y分之1
x^2+xy分之x-y 除以x^2y^2-x^4分之xy-x^2*x-y分之1
(x-y)/(x^2+xy)÷(xy-x^2)/(x^2y^2-x^4)X1/(x-y)
=(x-y)/(x^2+xy)÷(xy-x^2)/(x^2+xy)(xy-x^2)X1/(x-y)
=(x-y)/(x^2+xy)÷(x^2+xy)X1/(x-y)
=1
﹙x-y﹚／﹙x^2＋xy﹚÷﹙xy-x^2﹚／﹙x^2y^2-x^4﹚×1／﹙x－y﹚
=[﹙x－y﹚／x﹙x﹢y﹚]×[x^2﹙y－x﹚﹙y﹢x﹚／x﹙y－x﹚]×[1／﹙x－y﹚]1
=1
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