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解下列方程:                     (1) -4x2+3x+1=0; (2) 答案: 解: 4x2−3x−1=0 ,(4x+1)(x−1)=0 ,                                                                                                                x1=−14 , x2=1 解: 12x2−x=x−1 , 12x2−2x+1=0 ,x2−4x+2=0 ,(x−2)2=2x−2=±2 ,x1=2+2 , x2=2−2
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