《整式加减》易错题

1、Jixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式Jixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式Jixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式Jixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式;21;2;21; xxxxyyxa Jixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式a 32ab 32bca732ba yx2221 131 3167 543Jixishi h

2、engshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式12.1.165.3222222 xyxDbabbaCxxBxxA Jixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式._31)2(_2)1(223325，常数项是最高次项是项式，次是；，常数项是最高次项是项式，次是yxxxyyx 四三3xy52四三322yx31Jixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式3.1.3.3.211.2baFabEaDaCabBbaAJixishi hengshanzhongxue “自主互助自主

3、互助”课堂教学模式课堂教学模式).521( mm,21,mm).523( mJixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式Jixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式323232)3(xyyx与与22102)2(与与 2232)4(yxyx 与与323222)1(yxba与与Jixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式;0;212213;123;527;642;523222222532ababxxxabababababxxxaaaJixishi h

4、engshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式;233123) 1 (2222yxxyxyyxyx2)233123()1( 解：原式解：原式yx261 223523xyyx )312()233()1(2222xyxyyxyx 解：原式解：原式Jixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式)22()()3()2(22bbbbaaa 解：原式解：原式ba2 .223)2(22bbabbaa)22()()3()2(22bbbbaaa 解解：原原式式24ba Jixishi hengshanzhongxue “自主互助自主互

5、助”课堂教学模式课堂教学模式dcbadcba )()1(bacbac 2)(2)2(2343)2(43)3(22 xxxxcbacba )()4(Jixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式)2(3)22)(2()3()123)(1(222222abbaabbaxxxx 234)1(2 xx原式原式解：解：224)2(abba 原式原式Jixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式2)1(323222xxxx23323222xxxx 解：原式解：原式22223323xxxx 32)233(222

6、xxxx3242 xx化简：Jixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式;2)643(31)14(3.1232xxxxx的值，其中求多项式2343123232xxxx解：原式1123523xxx1)2(12)2(35)2(23原式12432083239Jixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式Jixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式Jixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式; 12, 12322 xxBxxA)12(2)123(222 xxxxBA解：解：22412322 xxxx21224322 xxxx1472 xxJixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式2532 xx3422 xx342)253(22xxxxA解：因为)253(34222xxxxA所以25334222 xxxxA23543222 xxxxA12 xxAJixishi hengshanzhongxue “自主互助自主互助”课堂教学模式课堂教学模式分钟元分钟元分钟元分钟元/)51.(/)51.(/)45.(/)45.(mnDmnCmnBmnA,)%