若xy满足根号2x-3+y³+根号3-2x=-8,则xy等于?
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若xy满足根号2x-3+y³+根号3-2x=-8,则xy等于?
若xy满足根号2x-3+y³+根号3-2x=-8,则xy等于?
若xy满足根号2x-3+y³+根号3-2x=-8,则xy等于?
∵﹛2x-3≥0
3-2x≥0
∴x=1.5
x=1.5代入根号2x-3+y³+根号3-2x=-8
得 0+y³+0=-8
y=-2
xy=1.5×(-2)=-3
∵两个根式有意义
∴2x-3>=0
3-2x>=0
∴x=3/2
把x=3/2代入根号2x-3+y³+根号3-2x=-8得
y³=-8
∴y=-2
∴xy=-3