2x(4次方）y（立方）-x（立方）y(四次方）
=(xy)³(2x-y)
=3³/3
=3*3
=9
已知2x-y=3分之一,xv=3,求2x(4次方）y（立方）-x（立方）y(四次方）的值
已知2x-y=3分之一,xv=3,求2x(4次方）y（立方）-x（立方）y(四次方）的值
其他人气：194 ℃时间：2020-09-21 06:06:42
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