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数学
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解方程x²-3x-根号(x²-3x)=2
人气:367 ℃ 时间:2020-03-23 21:44:30
解答
令 根号(x2-3x)=t,(显然t大於等於0) 则 (x2-3x)=t的平方
原式为 t的平方-t=2,
解之得t=2 或t=-1(舍去)
所以 根号(x2-3x)=2
解之得x=4或x=-1
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