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1、北师大版初中数学八年级（下）第二章分解因式回顾与思考练习题北师大版初中数学八年级（下）第二章分解因式回顾与思考练习题北师大版初中数学八年级（下）第二章分解因式回顾与思考练习题1 填空题(1)叫做多项式的因式分解.(2) 因式分解的方法是：(3)m(a-b)+2(b-a)=(a-b)()。若x2+mx+n=(x+3)(x-2),那么m=。n=(4)x2+4x+=(x+2)2。X3-y3=(x-y)(x2+y2)。X2-9y2=(x+)(x-)。2用提取公因式法分解因式(1).3ax+3ay (2).2ab-4a2b (3).12ab4+9a3b2-6a2b3 (4).-8x4y3-12x2y4+
2、16x5y2 (5).2x(a-b)-3y(b-a) (6).(a+b)2-4(a+b)+(a-b)(a+b)3 用公式法分解因式(1).7x2y4-112 x2m4 . (2).a6-a4+2a3+2a . (3).36a2-(a2+9)2 (4)a2+2ab+b2-c2-2cd-d2 6.解答下列各题(1)、证明：比奇数的平方少1的数、能被8整除。(2)、若 ， 求的值。(3)、若 ， 求的值。结束语！祝大家学到有用的知识，提升自己的能力，实现自己的梦想，踏踏实实干好每一件事，为美好的明天而努力！16me18eyd7e2d,3n879bgs5rq895s2fni3bvtmy,prh415e
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