十字相乘法因式 【2 】分化演习题 2x3x2 1.222x7x6 2.3.x4x214.x2x15 242(ab)4(ab)3 x6x85.6.22x3xy2y8.x43x328x2 7.9.x4x310.a7a10 22y7y12q6q8 11.12.2213.xx2014.m7m18 2p5p3616.t22t8 15.2217.xx2018.ax7ax8 2222x11xy18y a9ab14b19.20.2222xy5xy6x22.a34a212a 21.4222223x11x102x7x3 23.24.2225x6xy8y 6x7x525.26.27.2x15x728.3a8a4 29.5x7x630.5ab23ab10 2222422223ab17abxy10xy4xy5xy9y 31.32.2222233.4n4n1534.6ll35 222210x21xy2y8m22mn15n 35.36.2237.(x5x3)(x5x2)638.(x1)(x2)(x3)(x4)24 (1)a2-7a+6;(2)8x2+6x-35; (3)18x2-21x+5; (4) 20-9y-20y2; (5)2x2+3x+1; (6)2y2+y-6; (7)6x2-13x+6; (8)3a2-7a-6; (9)6x2-11x+3; (10)4m2+8m+3; (11)10x2-21x+2;(12)8m2-22m+15; 22 第1页,-共2页 (13)4n2+4n-15; (14)6a2+a-35; (15)5x2-8x-13;(16)4x2+15x+9; (17)15x2+x-2; (18)6y2+19y+10; (19)2(a+b) 2+(a+b)(a-b)-6(a-b) 2;(20)7(x-1) 2+4(x-1)-20; 第2页,-共2页 本文来源:https://www.wddqw.com/doc/b123d9c29889680203d8ce2f0066f5335a81678e.html