初二因式分解计算题?可能为正数或负数或零 二、解答题: 分解因式: (1)(ab+b)2��(a+b)2 (2)(a2��x2)2��4ax(x��a)2 (3)7xn+1��14xn+7xn��1(n为不小于1的整数) 答案: 一、那么,初二因式分解计算题?一起来了解一下吧。
1.因式分解3a^3b^2c-6a^2b^2c^2+9ab^2c^3=3ab^2 c(a^2-2ac+3c^2)
2.因式分解xy+6-2x-3y=(x-3)(y-2)
3.因式分解x^2(x-y)+y^2(y-x)=(x+y)(x-y)^2
4.因式分解2x^2-(a-2b)x-ab=(2x-a)(x+b)
5.因式分解a^4-9a^2b^2=a^2(a+3b)(a-3b)
8.因式分解ab(x^2-y^2)+xy(a^2-b^2)=(ay+bx)(ax-by)
9.因式分解(x+y)(a-b-c)+(x-y)(b+c-a)=2y(a-b-c)
10.因式分解a^2-a-b^2-b=(a+b)(a-b-1)
11.因式分解(3a-b)2-4(3a-b)(a+3b)+4(a+3b)2=[3a-b-2(a+3b)]^2=(a-7b)^2
12.因式分解(a+3)2-6(a+3)=(a+3)(a-3)
1.(3a-b)2-4(3a-b)(a+3b)+4(a+3b)2=[3a-b-2(a+3b)]^2=(a-7b)^2
2.(a+3)2-6(a+3)=(a+3)(a-3)
3(x+1)2(x+2)-(x+1)(x+2)2=-(x+1)(x+2)
4.abc+ab-4a=a(bc+b-4)
5.16x2-81=(4x+9)(4x-9)
6.9x2-30x+25=(3x-5)^2
7.x2-7x-30=(x-10)(x+3)
8.x2-25=(x+5)(x-5)
9.x2-20x+100=(x-10)^2
10.x2+4x+3=(x+1)(x+3)
11.4x2-12x+5=(2x-1)(2x-5)
12.3ax2-6ax=3ax(x-2)
13.x(x+2)-x=x(x+1)
14.x2-4x-ax+4a=(x-4)(x-a)
15.25x2-49=(5x-9)(5x+9)
16.36x2-60x+25=(6x-5)^2
17.4x2+12x+9=(2x+3)^2
18.x2-9x+18=(x-3)(x-6)
19.2x2-5x-3=(x-3)(2x+1)
20.12x2-50x+8=2(6x-1)(x-4)
21.(x+2)(x-3)+(x+2)(x+4)=(x+2)(2x-1)
22.2ax2-3x+2ax-3= (x+1)(2ax-3)
23.9x2-66x+121=(3x-11)^2
24.8-2x2=2(2+x)(2-x)
25.x2-x+14 =整数内无法分解
26.9x2-30x+25=(3x-5)^2
27.-20x2+9x+20=(-4x+5)(5x+4)
28.12x2-29x+15=(4x-3)(3x-5)
29.36x2+39x+9=3(3x+1)(4x+3)
30.21x2-31x-22=(21x+11)(x-2)
31.9x4-35x2-4=(9x^2+1)(x+2)(x-2)
32.(2x+1)(x+1)+(2x+1)(x-3)=2(x-1)(2x+1)
33.2ax2-3x+2ax-3=(x+1)(2ax-3)
34.x(y+2)-x-y-1=(x-1)(y+1)
35.(x2-3x)+(x-3)2=(x-3)(2x-3)
36.9x2-66x+121=(3x-11)^2
37.8-2x2=2(2-x)(2+x)
38.x4-1=(x-1)(x+1)(x^2+1)
39.x2+4x-xy-2y+4=(x+2)(x-y+2)
40.4x2-12x+5=(2x-1)(2x-5)
41.21x2-31x-22=(21x+11)(x-2)
42.3x2-6x=3x(x-2)
43.49x2-25=(7x+5)(7x-5)
44.6x2-13x+5=(2x-1)(3x-5)
45.x2+2-3x=(x-1)(x-2)
46.12x2-23x-24=(3x-8)(4x+3)
47.(x+6)(x-6)-(x-6)=(x-6)(x+5)
48.3(x+2)(x-5)-(x+2)(x-3)=2(x-6)(x+2)
49.9x2+42x+49=(3x+7)^2 .
还有这; http://wenku.baidu.com/view/e9929a3d5727a5e9856a61e4.html
十字相乘法看这 http://baike.baidu.com/view/198055.htm
(2x+1)(x+1)+(2x+1)(x-3)=2(x-1)(2x+1)
2ax^2-3x+2ax-3=(x+1)(2ax-3)
x(y+2)-x-y-1=(x-1)(y+1)
(x^2-3x)+(x-3)^2=(x-3)(2x-3)
9x^2-66x+121=(3x-11)^2
8-2x^2=2(2-x)(2+x)
x^4-1=(x-1)(x+1)(x^2+1)
x^2+4x-xy-2y+4=(x+2)(x-y+2)
4x^2-12x+5=(2x-1)(2x-5)
21x^2-31x-22=(21x+11)(x-2)
4x^2+4xy+y2-4x-2y-3=(2x+y-3)(2x+y+1)
9x^5-35x^3-4x=x(9x^2+1)(x+2)(x-2)
【1】x四次方-7x²+6=(x^2-1)(x^2-6)=(x-1)(x+1)(x-√6)(x+√6)
【2】x四次方-5x²-36=(x^2-9)(x^2+4)=(x-3)(x+3)(x^2+4)
【3】4x四次方-65x²y²+16y四次方=(4x^2-y^2)(x^2-16y^2)=(2x-y)(2x+y)(x-4y)(x+4y)
【4】4a²-b²+6a-3b=(2a-b)(2a+b)+3(2a-b)=(2a-b)(2a+b+3)
【5】(x²-3)²-4x²=(x^2-2x-3)(x^2+2x-3)=(x-3)(x+1)(x-1)(x+3)
【6】x²(x-2)²-9=(x^2-2x-3)(x^2-2x+3)=(x-3)(x+1)(x^2-2x+3)
【7】(3x²+2x+1)²-(2x²+3x+3)²=(x^2-x-2)(5x^2+5x+4)=(x-2)(x+1)(5x^2+5x+4)
【1】x四次方-7x²+6=(x²-1)(x²-6)=(x-1)(x+1)(x-√6)(x+√6)
【2】x四次方-5x²-36=(x²+4)(x²-9)=(x-3)(x+3)(x²+4)
【3】4x四次方-65x²y²+16y四次方=(4x²-y²)(x²-16y²)=(2x-y)(2x+y)(x-4y)(x+4y)
【4】4a²-b²+6a-3b=(2a-b)(2a+b)+3(2a-b)=(2a-b)(2a+b+3)
【5】(x²-3)²-4x²=(x²-3-2x)(x²-3+2x)=(x+1)(x-3)(x-1)(x+3)
【6】x²(x-2)²-9=(x(x-2)-3)(x(x-2)+3)=(x²-2x-3)(x²-2x+3)=(x+1)(x-3)(x²-2x+3)
【7】(3x²+2x+1)²(2x²+3x+3)² 不能再分解
【8】(x²+x)²-17(x²+x)+60=(x²+x-5)(x²+x-12)=(x-3)(x+4)(x²+x-5)
【9】(x²+2x)²-7(x²+2x)-8=(x²+2x+1)(x²+2x-8)=(x+1)²(x-2)(x+4)
【10】-7x²y-14xy²+49x²y²=-7xy(x+2y-7xy)
二、先化简再求值
(a²+3a)分之(a²+3a+2)除以(a+3)分之(a+1)-(2)分之(a+2),其中a=根号三。
以上就是初二因式分解计算题的全部内容,1.a^2-8a+16 2.x^3y-18xy^3 一、填空题 1、因式分解: 9x2-1=___, 4x2-4x+1=___.a4-b4=___, an+2-an=___2、多项式x2+mx+36是一个完全平方式,则m=___.3、。