在解题时,我们如果找到了技巧,则可使解题过程收到事半功倍之效,解一元二次方程也是这样.一元二次方程的解法有四种:直接开平方法、配方法、求根公式法、因式分解法.其中求根公式法是通法,而其余三种是特殊解法.在解一元二次方程时,我们要仔细观察方程的形式和系数特征,选择恰当的解法,以使解题过程达到简洁、明快的效果.例1解方程3x(x-1)=2-2x.特点方程两边都有因式(x-1),因此宜用因式分解法. When we solve the problem, if we find the skill, we can make the problem-solving process get a multiplier effect, as well as the solution of the quadratic equation. There are four solutions to the quadratic equation: direct Kaiping method, matching method, Formula method, factorization method, where the root formula method is the pass method, and the remaining three are special solutions in the solution of a quadratic equation, we must carefully observe the form of the equation and coefficient characteristics, select the appropriate solution to Example 1 Solution 3x (x-1) = 2-2x. Features Equation has factor (x-1) on both sides, it is appropriate to use factorization.