分解因式练习题姓名朱旻一计算下列各式:_____________=1)-1)(a+(5)a(a________________=3)-(4)(y____________=4)-4)(m+(3)(m___________=c)+b+(2)m(a__________=1)-3x(x)1(2根据上面的算式填空:_________96)5(________)4(______)3(________16)2(________33)1(2322yyaamcmbmamxx下列由左到右的变形,哪些是分解因式?为什么?)(222)4(1))((1)3()2)(2(4)2(9)3)(3)(1(2222rRmmrmRbababammmaaa下列由左到右的变形,哪些是分解因式?tttttyyyxxyxayaxyxa3)4)(4(316)4()2(44)3()12(54410)2()()1(22225.24.354.322.194811.15819.1622000199919991999)1(3213212IRRRIRIRIR,,,的值,其中求代数式整除吗?能被)(整除吗?整除吗?能被能被例1:xxxabcabaxxx281224)4(128)3(217)2(63)1(23322随堂练习1.写出下列多项式各项的公因式ababbayykykxmbma22232)4(205)3(84)2()1(2.把下列各式分解因式:xxxacabababbammabax242)6()5(95)4(64)3(5)2(728)1(2322232习题2.21.把下列各式分解因式:xx42)1(2mnnm28)2(2222)3(axyyxaxxx933)4(23abbabayxyyx264)6(;281224)5(233322mamamaxyxyx1263)8(;8122)7(233222.利用分解因式进行计算:(1)121×0.13+12.1×0.9-12×1.21(2)2.34×13.2+0.66×13.2-26.4(3)14.3121620,321232221mmmmRRRRRR,,,其中例2把a(x-3)+2b(x-3)分解因式:解:例3:把下列各式分解因式:23)(12)(6)2();()()1(mnnmxybyxa做一做请在下列各式等号右边的括号前填入“+”或“-”,使等式成立)______()6()_______()5()______())(4()________()3()_______()2()2______(2)1(222222tstsnmnmbaabbaabyxxyaa随堂练习把下列各式分解因式222)()()6();(3)(2)5();2()2()4();(12)(6)3()()(3)2();()()1(mnmnmmnyxxymbmapqqpyxyxabaybax习题2.31.把下列各式分解因式:;)())(()8();2(3)32)(2)(7(;)(12)(18)6();()()5()()()4();()(2)3();(6)(3)2();1()1(7)1(22322222222yxxyxyxxbaababaabbbabanbamxyyyxxnmmnmabbaaxa2.先分解因式,在计算求值:.2),2(6)2)(2(6,5.1),2(3)2(4)1(2aaamxmxmx其中其中