已知(a²+b²)²-2(a²+b²)-8=0.且a.b均为实数,求a²+b²的值.
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已知(a²+b²)²-2(a²+b²)-8=0.且a.b均为实数,求a²+b²的值.
已知(a²+b²)²-2(a²+b²)-8=0.且a.b均为实数,求a²+b²的值.
已知(a²+b²)²-2(a²+b²)-8=0.且a.b均为实数,求a²+b²的值.