解方程：x2﹣x+2=0．

解方程：x²﹣x+2=0．

答案

解：x²﹣x+2=0，

∵b²﹣4ac=（﹣1）²﹣4×1×2=﹣7＜0，

∴此方程无解．

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解方程：x2﹣x+2=0．

答案

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