文档介绍：蚀一、·(-a)5·(-3a)3袅莄莀羈2.[(am)n]p芇螄膁羀3.(-mn)2(-m2n)3莅芃袁螇4.(-a2b)3·(-ab2)螈蚂蚁衿5.(-3ab)·(-a2c)·6ab2袆肂莂袀6.(-ab)3·(-a2b)·(-a2b4c)2羄螅膂7.(3m-n)(m-2n).蚇莇膅袂8.(x+2y)(5a+3b).(x2+2x+1)-(2x+3)(x-5)螀袈肃聿10.(-2x-5)(2x-5)薇羆蒃袀11.-(2x2+3y)(3y-2x2)虿肄袂薀12.(a-5)2-(a+6)(a-6)螀蒇莁13.(2x-3y)(3y+2x)-(4y-3x)(3x+4y)(2x+1)(2x-1)-2(3x+2)(2-3x)蕿膁螈肅蚀15.(x+y)(x-y)(x2+y2)、--6ab2+18a2b2-12a3b2c的公因式是()芆A.-6ab2cB.-ab2C.-6ab2D.-()-9a2b2=3abc(4-3ab)-3xy+6y=3y(x2-x+2y)蒆C.-a2+ab-ac=-a(a-b+c)+5xy-y=y(x2+5x)()--15ab4--20a2b3+-10a3b3+()薃A.-2ab2+4a2b=2ab(-b+2a)(a-b)-9n(b-a)=3(a-b)(m+3n)蚃C.-5ab+15a2bx+25ab3y=-5ab(-3ax-5b2y);-6ay-3a=3a(y2-2y-1):薈(1)ma+mb+mc=m(________);(2)多项式32p2q3-8pq4m的公因式是_________;芃(3)3a2-6ab+a=_________(3a-6b+1);(4)因式分解:km+kn=_________;蒁(5)-15a2+5a=________(3a-1);(6)计算:21×-31×=:羈(1)8ab2-16a3b3;(2)-15xy-5x2;肄薂袀(3)a3b3+a2b2-ab;(4)-3a3m-6a2m+:-(a-b)mn-a+、(n-2)-m2(2-n)因式分解等于()蒀A.(n-2)(m+m2)B.(n-2)(m-m2)(n-2)(m+1)(n-2)(m-1)(x-y)+2by-2bx分解因式,正确的结果是()蒄A.(x-y)(-a+2b)B.(x-y)(a+2b)薈C.(x-y)(a-2b)D.-(x-y)(a+2b):螆(1)(a+b)-(a+b)2;(2)x(x-y)+y(y-x);芁羀螈蒆莂(3)6(m+n)2-2(m+n);(4)m(m-n)2-n