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老师说汪辉同学的解法较好 ,很简捷 .王婷同学是学习委员 ,当然不甘落后 .她观察方程 3ｘ(ｘ -1 ) =2 -2ｘ ,发现 2 -2ｘ =-2 (ｘ -1 ) ,这样 ,方程左右两边有公因式 (ｘ -1 ) ,能否用提公因式法来解呢 ?于是她这样解 :移项 ,得 3ｘ(ｘ -1 ) +2ｘ -2 =0 3ｘ(ｘ -1 ) +2 (ｘ -1
The teacher said that Wang Hui’s solution is better and simpler. Wang Ting is a member of the study committee and certainly not far behind. She observes the equation 3x(x -1) = 2 -2x and finds that 2 -2x = -2 (x -1) In this way, there is a common factor (x -1) on both the left and right side of the equation. Can it be solved using the public factor method? So she solves this problem: shift the term to get 3x(x -1) +2x -2 =0 3x (x -1 ) +2 (x -1