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因式分解 姓名
1、 用提公因式法:
(1)4a3b2-6ab3c= ;(2)3x2-6xy+x= ; (3)-4m3+16m2-6m= ;(4)ax+ay= ;(5)4a2+10ab= ; (6)-x2+xy-xz= ;(7)-24x2y-12xy2+28y3= ; (8)56x3yz+14x2y2z-21xy2z2= ;a(x+y)+b(x+y)= ; (9)2a(b+c)-3(b+c)= ;(10)5x(x-y)+2y(x-y)= ; (11)(m+n)(p+q)-(m+n)(p-q)= ;(12)a(a-b)+(a-b)2= ; (13)(2a+b)(2a-3b)-3a(2a+b)= ; 2、 把下列多项式分解因式:
(1)p(x-y)-q(y-x) (2)m(a-3)+2(3-a) (3)(a+b)(a-b)-(b+a)
(4)a(x-a)+b(a-x)-c(x-a) (5)10a(x-y)2-5b(y-x) (6)3(x-1)3y-(1-x)2z
3、 用公式因式分解: (1)a2-
12
x= ;36-m2= ;4x2-9y2= 9(2)36n2-1= ;25p2-49q2= ;0.81a2-16b2= ; (3)121x2-4y2= ;a2p2-b2q2= ;x2-2x+1= ; (4)a2+8a+16= ;1-4t+4t2= ;m2-14m+49= ; (5)b2-22b+121= ;y2+y+
1= ;25a2+80a+64= ; 4(6)a2b2-4ab+4= ;16-8xy+x2y2= ;2xy-x2-y2= ; 4、 把下列多项式因式分解: (1)4a2-(b+c)2; (2)(3m+2n)2-(m-n)2; (3)2ab3-2ab;
(4)1-a4; (5)x3-16x; (6)-x4+16
(7)(2x+y)2-(x+2y)2; (8)(a+b+c)2-(a+b-c)2
(9)81a4-b4; (10)8y4-2y2; (11)3ax2-3ay2;
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5、 把下列多项式分解因式: (1)(X+Y)2+6(X+Y)+9 (2)(m+n)2+4m(m+n)+4m2;
(3)3-6x+3x2; (4)-a+2a2-a3; (5)a4-2a2b2+b4; (6)(x2+9)2-36x2;
(7)4-12(x-y)+9(x-y)2; (8)4x2(a+b)2-12xy(a+b)+9y2;
(9)20a3x3-45axy2; (10)a3-4a2b+4ab2; (11)a4-8ab+16b4;
(12)a4x2+4a2x2y+4x2y2; (13)16a2b4-8ab3c2+b2c4; (14)a4-
(15)a2(a-b)+b2(b-a); (16)(y2-6)2-6(y2-6)+9;
(17)-x4+2x2y2-y4; (18)(x-a)+a(a-x)
(19)(x+2)(x-3)(x-7)+(2+x)(3-x)(x+3); (20)a-a;
(21)4(x+y+z)-9(x-y-z) (22)(x+2x)+2x+4x+1
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121a+; 216