倒数相加√(x-y)/2-2/√(x-y)

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倒数相加√(x-y)/2-2/√(x-y)倒数相加√(x-y)/2-2/√(x-y)倒数相加√(x-y)/2-2/√(x-y)√(x-y)/2-2/√(x-y)=(x-y)/vx-y-2/vx-y=(

倒数相加√(x-y)/2-2/√(x-y)
倒数相加
√(x-y)/2-2/√(x-y)

倒数相加√(x-y)/2-2/√(x-y)
√(x-y)/2-2/√(x-y)
=(x-y)/vx-y-2/vx-y
=(x-y-2)/v(x-y)
=(x-y-2)vx-y/(x-y)

通分
原式=(x-y-4)/2√(x-y)