若/x+y-2/+(2x-3y+6)的平方等于0则x=( )y=( )
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若/x+y-2/+(2x-3y+6)的平方等于0则x=( )y=( )
若/x+y-2/+(2x-3y+6)的平方等于0则x=( )y=( )
若/x+y-2/+(2x-3y+6)的平方等于0则x=( )y=( )
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