一元二次方程的解法VIP免费

ideological and theoretical qualities and practical working ability, and strive to build a contingent of league cadres with positive work style and high quality. Hold a regular meting of the party secretary every fortnightly, arrange the work of the regiment, fedback the student information. Focus on training junior high school, junior high school secretary of the regiment branch to enable them to raise A firm political conviction, diligent and diligent learning spirit and practical and innovative work style.一元二次方程的解法课 型：新授课 学生姓名：______学习目标：会用直接开平方法解形如和的方程教学重点：合理选择直接开平方法和因式分解法较熟练地解一元二次方程教学难点：理解一元二次方程无实根的解题过程教学过程：一、情境：1、把下列方程化为一般形式，并说出各项及其系数。（1） （2） （3）2、复述平方根的意义，完成下列填空：4 的平方根是 ，81 的平方根是 ， 100 的算术平方根是 。二、新课讲授：1、思考：如何解形如的方程呢？直接开平方法：2、例 1：（1） （2） （3）（4）板演练习： 解下列方程：（1）x2＝169； （2）45－x2＝0； （3）12y2－25＝0； （4）4x2+16＝0反思：写出两根互为相反数的一元二次方程_________。3、思考：如何解形如的方程？4、例 2：解下列方程Strengthen the team connection, strengthen the knowledge education among the students (especially the first grade students), and promote the formation of good school spirit with the influence of the league members. All League branches should start with recommending outstanding students as the development objects of the League, take amateur league schools as the basis, conscientiously do a good job in the work of pre-league education, league membership education, League members' vanguard exemplary consciousness education, excellent league members' education, etc. Under the premise of ensuring the quality, the development quantity of league members wil...