Question

几道初一因式分解练习题，大哥大姐帮我看一下，要过程啊，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！

Answer 2

1.x^-8x+7=(x-7)(x-1)
2.X^+8X+7=(x+7)(x+1)
3.X^-10X-11=(x-11)(x+1)
4.X^-10X+11,题目抄错了吧
5.x^+10X-11=(x+11)(x-1)
6.X^+3x-18=(x+6)(x-3)
7.x^+11X+18=(x+9)(x+2)
8.x^-11x+18=(x-2)(x-9)
9.x^+17X-18=(x+18)(x-1)
10.X^-17X-18=(x-18)(x+1)
1. 2X^-3XY-X=x(2x-3y-1)
2. (X+Y)^(X+Y)(X-Y)(X+Y)(Y+Z)
3. 3X(a+2b)^-6XY(a+2b)=3x(a+2b)[3x(a+2b)-2y]
4. a(x-y)-b(X-Y)-C(Y-X)=(x-y)(a-b+c)
5. (b-a)^-2a+2b=(b-a)^+2(b-a)=(b-a)(b-a+2)
6. (x-y)^-m(y-x)+y-x=(x-y)^+m(x-y)-(x-y)=(x-y)(x-y+m-1)
7. x(x-y)(a-b)-y(y-x)(b-a)=(x-y)(x-y)(a-b)=(x-y)^(a-b)
8. 已知a+b=13,ab=40,求 a^b+ab^的值
^是平方
a^b+ab^=ab(a+b)=40*13=520

Answer 3

1 x^-8x+7
=(X-1)(x-7)
2.X^+8X+7
=(x+1)(x+7)
3.X^-10X-11
=(x+1)(x-11)
4.X^-10X+11
=（x+1)(x-11)
5.x^+10X-11
=(x-1)(x+11)
6.X^+3x-18
(x+6)(x-3)
7.x^+11X+18
=(x+2)(x+9)
大姐，太简单了好不好

Answer 4

1.x^-8x+7=(X-1)(X-7)
2.X^+8X+7=(X+1)(X+7)
3.X^-10X-11=(X-11)(X+1)
4.X^-10X+11= 要在实数 内分 除以没学算了
5.x^+10X-11=(X+11)(X-1)
6.X^+3x-18=(x-3)(X-6)
7.x^+11X+18=(X+2)(X+9)
8.x^-11x+18(X-2)(X-9)
9.x^+17X-18=(X-1)(X+18)
10.X^-17X-18=(X-18)(X+1)
1. 2X^-3XY-X =X(2X-3Y-1)
2. (X+Y)^(X+Y)(X-Y)(X+Y)(Y+Z) =(x+Y)^4(X-Y)(Y+z)
3. 3X(a+2b)^-6XY(a+2b)=3X(A+2B)(A+2B-2Y)
4. a(x-y)-b(X-Y)-C(Y-X)=(X-Y)(A-B-c)
5. (b-a)^-2a+2b=(B-a)(B-A+2)
6. (x-y)^-m(y-x)+y-x=(Y-X)(Y-X-M+1)
7. x(x-y)(a-b)-y(y-x)(b-a)=(X-Y)^(A-B)
8. 已知a+b=13,ab=40,求 a^b+ab^的值 a^b+ab^=ab(A+B) =13*40=520

Answer 5

1 (x-1)*(x+8)