√9-4倍根号5√x²+x²分之1 - 2(0
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√9-4倍根号5√x²+x²分之1 - 2(0
√9-4倍根号5
√x²+x²分之1 - 2(0
√9-4倍根号5√x²+x²分之1 - 2(0
√9-4倍根号5
=√(4+5-2×2×√5)
=√(2-√5)²
=√5-2;
√x²+x²分之1 - 2(0
√9-4倍根号5
=3-4倍根号5
√x²+x²分之1 - 2(0
=x分之1-X