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

题目

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

答案

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)...