课外活动时,老师出了一个高次方程的难题,在大家充分思考后,老师给出了一个将所给方程两边的二次三项式分别进行配方的方法,我注意到方程里这三个二次三项式彼此差别不大,故想到了换元法,经过尝试发现也能凑效. Extracurricular activities, the teacher out of the problem of a high degree of equations, after we fully consider, the teacher gives a method to formulate the quadratic tripartite equation on both sides of the equation, I noticed that the three equations Quadratic trinocular little difference between each other, so think of the yuan for the law, after trying to find ways to make ends meet.