“一元二次方程”这一节 ,根据教学大纲要求 ,应掌握整式方程、一元二次方程的含义 ,以及一元二次方程的一般形式 ,会把一元二次方程化为一般形式 .本节需突出两个重点 :第一 ,一元二次方程的含义 ;第二 ,化一元二次方程为一般形式 ,并分清二次项及其系数、一次项及其系数、常 According to the syllabus requirements, the section of “one-variable quadratic equation” should grasp the meaning of the integral equation, the one-dimensional quadratic equation, and the general form of the one-dimensional quadratic equation, and convert the one-dimensional quadratic equation into a general form. Highlight two points: first, the meaning of the quadratic equation; second, the quadratic equation is a general form, and distinguish the quadratic term and its coefficient, the first term and its coefficient, and