_第⒍2节提取公因式法（In the 2 section _ extracting common factor method）.docVIP

下载本文档

4
0
约5.05千字
约 7页
2017-08-22 发布于河南
举报
版权申诉

_第⒍2节提取公因式法（In the 2 section _ extracting common factor method）.doc

1、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。。
2、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
3、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
4、该文档为VIP文档，如果想要下载，成为VIP会员后，下载免费。
5、成为VIP后，下载本文档将扣除1次下载权益。下载后，不支持退款、换文档。如有疑问请联系我们。
6、成为VIP后，您将拥有八大权益，权益包括：VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
7、VIP文档为合作方或网友上传，每下载1次，网站将根据用户上传文档的质量评分、类型等，对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档

_第⒍2节提取公因式法（In the 2 section _ extracting common factor method）

_第⒍2节提取公因式法（In the 2 section _ extracting common factor method） Article 6 / section 2 common factor extraction method [teaching objectives] Factoring will be extracted from the common factor method Learn the rules of parenthesis [key points and difficulties] 1., teaching emphasis: correctly identify the common factor, and use the common factor method for factoring 2. teaching difficulties: Factoring of example 3 [teaching process] Review the concept of factoring Create situations and ask questions Look whos the fastest: 0.564 x 899+0.564 x 101=0.564 * (899+101) =564 In this process, the 0.564 for m, 899 for a, 101 for B, and =m Mamb: (a + b) (students are initially aware that factoring can make computing easy.) Two, observation, analysis, explore new knowledge (let students discover the characteristics of the polynomial and draw out the concept of the common factor.) The same factor contained in a polynomial is called the common factor of the polynomial. Note: the common factor is the common factor contained in every item in a polynomial. According to the definition of common factor, the following common factors are found Ax+ay-az, II, x2y+x3, 8x-12y, 4a2b+6ac (4) group discussion: let students sum up the relation between the common factor and the polynomial, and guide the induction from the index of coefficients, letters and letters Conclusion: 1: the common factor coefficient coefficient should be the greatest common divisor coefficient (when the coefficient is integer) The letter: the letter in the same letter take polynomial containing (3) index: the index of the same letter takes the smallest of each, that is, the lowest power Three consolidate the new knowledge through practice Indicate the common divisors of the following polynomials The 2x2y3+6x3 (2x2) (2) 3ax2y - 6ayz3+9ay2 (3ay); The 7x2-21x (7x) The 8a3b2-12ab3+ab (AB) The 7 (3-x) -x (3-x) (3-x) (1) (2) by the teacher analysis, the application of the conclusions just drawn, and the rest of the students c