当(x²+y²)(x²-1+y²)-30=0时,x²+y²=
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当(x²+y²)(x²-1+y²)-30=0时,x²+y²=
当(x²+y²)(x²-1+y²)-30=0时,x²+y²=
当(x²+y²)(x²-1+y²)-30=0时,x²+y²=
x²+y²=6
绝对正确的答案