1、因式分解第 1 页 共 6 页提取公因式法3250de 2364pqpq完全分解下列各式 22147accd22abcad23pqpq()3()xyb()()xbya6x532ymnz92348xyz2apapa3291xyx2345zz23bcbc 6ax5ay 42x248n 112bb 2bba639aax 124a222yxy()(3)(abcdabcd十字相乘法265x256x23y()acdbcx完全分解下列各式 2149x 210k2p286ab205xy 49因式分解第 2 页 共 6 页22715xy2715xy30ab30a226xy 266xy1 251pq2536p 2
2、767q43a24a28m283mn670p2670p 22q214q6190a29ab2xx 236y2848y145x2135xy221y2491m698x20ab2405mn24p分组分解法2xyb321xx完全分解下列各式 3xay 2mbc22pq 2axyx因式分解第 3 页 共 6 页321y23mn43c 2cdc22epe 26baa32123xya48mnb281pqrq22pqrpr2235xyxy3(1)(3)6426ab公式法22ab222()xaacdbcx3 3ab22333abca(对自然数 n) n(对奇数 n) 22168e 2248cd4pq完全分解下列各
3、式 26x 24cb210nm 1ay 28xy因式分解第 4 页 共 6 页249cde22()cd2xy69ef29416ffg22510pq29yz 4n24mn2293pq216xy4xy(5)(3)ab22949z662mn438568xyxy4495xyz 22194ab 45ab2916xyz 29x23ab 426cab6124xy 22()38338xyzx521a 75257ab325296nnnxax2146845200mmbb2()accb31xy 333(1(2)()xx33()abcc因式分解第 5 页 共 6 页添项和拆项4321aax32432158914x3xyy15296mm完全分解下列因式 64ab9xy338ca2151x 2xy32ab2xyzxzyx226731xyx225734x8329651a22320xyxy5a322(1)(1)xxxa因式分解第 6 页 共 6 页54232222(63)(9)()(9)6xyxyxyxyxy421781814()()()xx5n87144222abcabca
