题目
题型:解答题难度:一般来源:不详
把下列各式分解因式: (1)x6-81x2y4 | (2)2x2-x-3 | |
(3)x2-7x-8 | (4)a3-2a2+a | |
(5)a2+6a+5 | (6)7x2+13x-2 | |
(7)-x2+4x+5 | (8)-3x2+10x+8 | |
(9)x3z-4x2yz+4xy2z | (10)x3z-4x2yz+4xy2z | |
(11)x4+6x2+9 | (12)(x-1)2-4(x-1)y+4y2 | |
(13)(x2-10)(x2+5)+54 | (14)(a-b)(x-y)-(b-a)(x+y) | |
(15)4m5+8m3n2+4mn4 | (16)4a2+4ab+b2-1 | |
(17)x3-x2-2x+2. | ||
(1)x6-81x2y4, =x2(x4-81y4), =x2(x2+9y2)(x2-9y2), =x2(x2+9y2)(x+3y)(x-3y); (2)2x2-x-3=(2x-3)(x+1); (3)x2-7x-8=(x+1)(x-8); (4)a3-2a2+a, =a(a2-2a+1), =a(a-1)2; (5)a2+6a+5=(a+1)(a+5); (6)7x2+13x-2=(7x+1)(x-2); (7)-x2+4x+5 =-(x2-4x-5), =-(x+1)(x-5); (8)-3x2+10x+8, =-(3x2-10x-8), =-(3x+2)(x-4); (9)x3z-4x2yz+4xy2z, =xz(x2-4xy+4y2), =xz(x-2y)2; (10)x3z-4x2yz+4xy2z, =xz(x2-4xy+4y2), =xz(x-2y)2; (11)x4+6x2+9=(x+3)2; (12)(x-1)2-4(x-1)y+4y2=(x-1-2y)2; (13)(x2-10)(x2+5)+54, =x4-5x2-50+54, =x4-5x2+4, =(x2-1)(x2-4), =(x+1)(x-1)(x+2)(x-2); (14)(a-b)(x-y)-(b-a)(x+y), =(a-b)(x-y+x+y), =2x(a-b); (15)4m5+8m3n2+4mn4, =4m(m4+2m2n2+4n4), =4m(m2+n2)2; (16)4a2+4ab+b2-1, =(4a2+4ab+b2)-1, =(2a+b)2-1, =(2a+b+1)(2a+b-1); (17)x3-x2-2x+2, =(x3-x2)-(2x-2), =x2(x-1)-2(x-1), =(x-1)(x2-2). | ||
分解因式:2a(x2+1)2-2ax2. | ||
3-6y2. | ||
(23s2•苏州)若a=2,a+b=e,则a2+ab=______. | ||
分解因式: (1)2a2-8 (2)x2y-6xy+8y. | ||
分解因式:x2-4x+4=______,计算:(-
|