△ABC中,若a^4+b^4+c^4=2(a²+b²)c²,则∠C的度数为
△ABC中,若a^4+b^4+c^4=2(a²+b²)c²,则∠C的度数为
数学人气:916 ℃时间:2020-05-06 01:12:58
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a^4+b^4+c^4=2(a²+b²)c²a^4+2a²b²+b^4-2(a²+b²)c²+c^4-2a²b²=0(a²+b²)²-2(a²+b²)c²+c^4-2a²b²=0(a²+b²+c...
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