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选择、填空题虽然较为基础,解起来省时 简单,但也有个别题,如若考虑不周,或凭空乱 猜,或基础欠扎实,基本技能运用欠灵活,也易 导致选错、做错这一现象．现就以2005年各地 中考题为例,解说如下． 例1 (浙江省实验区)在日常生活中如取 款、上网等都需要密码．有一种用“因式分解” 法产生的密码,方便记忆．原理是:如对于多项 式x4-y4,因式分解的结果是(x-y)(x+y)(x2 +y2),若取x=9,y=9时,则各个因式的值是: 选择、填空题虽然较为基础,解起来省时 简单,但也有个别题,如若考虑不周,或凭空乱 猜,或基础欠扎实,基本技能运用欠灵活,也易 导致选错、做错这一现象．现就以2005年各地 中考题为例,解说如下． 例1 (浙江省实验区)在日常生活中如取 款、上网等都需要密码．有一种用“因式分解” 法产生的密码,方便记忆．原理是:如对于多项 式x4-y4,因式分解的结果是(x-y)(x+y)(x2 +y2),若取x=9,y=9时,则各个因式的值是:
Although the choice and fill-in questions are more basic, they are simple to solve, save time, but there are also individual questions. If you think badly, or chaos to guess from the ground, or the foundation is not solid, the basic skills are not flexible enough, and it is easy to cause mistakes. phenomenon. Now take the exam questions in various places in 2005 as an example to explain as follows. Example 1 (Zhejiang Experimental Area) requires passwords for daily withdrawals, Internet access, etc. There is a password generated by the “factor factorization” method for easy memory. The principle is: For polynomial x4-y4, the result of factorization is (xy)(x+y)(x2 + y2). If x=9 and y=9, the value of each factor is: Although filling in the blanks is more basic, it saves time and is simple, but there are also individual questions. If you think badly, or chaos to guess from the ground, or the foundation is not solid, the basic skills are not flexible enough to use, and it is easy to cause wrong choices and mistakes. . Take the exam questions in various places in 2005 as an example to explain the following. Example 1 (Zhejiang Experimental Area) requires passwords for daily withdrawals, Internet access, etc. There is a password generated by the “factor factorization” method for easy memory. The principle is: For polynomial x4-y4, the result of factorization is (x-y)(x+y)(x2 + y2). If x=9 and y=9, the value of each factor is: