几道初一因式分解练习题,大哥大姐帮我看一下,谢谢你们了T.T,最近数学完全听不懂1.x^-8x+72.X^+8X+73.X^-10X-114.X^-10X+115.x^+10X-116.X^+3x-187.x^+11X+188.x^-11x+189.x^+17X-1810.X^-17X-181.2X^-3XY-X2.(X+Y)^(X+Y)(X-Y)(X+Y)(Y

Question

几道初一因式分解练习题,大哥大姐帮我看一下,谢谢你们了T.T,最近数学完全听不懂
1.x^-8x+7
2.X^+8X+7
3.X^-10X-11
4.X^-10X+11
5.x^+10X-11
6.X^+3x-18
7.x^+11X+18
8.x^-11x+18
9.x^+17X-18
10.X^-17X-18
1.2X^-3XY-X
2.(X+Y)^(X+Y)(X-Y)(X+Y)(Y+Z)
3.3X(a+2b)^-6XY(a+2b)
4.a(x-y)-b(X-Y)-C(Y-X)
5.(b-a)^-2a+2b
6.(x-y)^-m(y-x)+y-x
7.x(x-y)(a-b)-y(y-x)(b-a)
8.已知a+b=13,ab=40,求 a^b+ab^的值
^是平方

Answer 1

1.（x-1）（x-7）
2.(x+1)(x+7)
3.(x+1)(x-11)
4.无实数解
5.(x+11)(x-1)
6.(x+6)(x-3)
8.(x-9)(x-2)
9.(x+18)(x-1)
10.(x+1)(x-18)
以上均为简单十字相乘
11.原式=x(2x-3y-1)
12.原式=(x+y)^4(x-y)(y+z)
13.原式=3x(a+2b)(1-2y)
14.原式=a(x+y)-b(x+y)+c(x+y)
=(a-b+c)(x+y)
15.原式=(b-a)^+2(b-a)
=(b-a)(b-a+2)
16.原式=(y-x)^-m(y-x)+(y-x)
=(y-x)(y-x-m+1)
17.原式=x(y-x)(b-a)-y(y-x)(b-a)
=(x-y)(y-x)(b-a)
=-(x-y)^(b-a)
18.原式=ab(a+b)
将ab=40,a+b=13代人上式得：13乘40=520
我建议你好好看看课本,先搞清楚基本方法,再多做些题,一定要把因式分解学好啊!