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解方程①(x+3/x-1)²-5(x+3/x-1)+6=0 ②x²-2/x+3-6x+18/x²+1=0
人气:174 ℃ 时间:2020-02-06 05:23:17
解答
1,(1)将(x+3/x-1)设为a
(2)得a²-5a+6=0
(3)因式分解(a-2)(a-3)=0
(4)a1=2 a2=3
2,化简得x³-4x²+18=0
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