因式分解，谢谢大家帮我！！！急

来源：百度知道 编辑：UC知道 时间：2024/05/23 23:03:42
（1）m(a-b)+n(b-a)
(2)(x-3)^2-(2x-6)
(3)(x-y)(a-b)-(y-x)(a+b)
(4)2(x+3)^2-x-3

(m-n)(a-b)
(x-5)(x-3)
2a(x-y)
(x+3)(2x+5)
我自己算的，给分吧

（1）m(a-b)+n(b-a) =(m-n)(a-b)

(2)(x-3)^2-(2x-6) =x^2-6x+9-2x+6=x^2-8x+15
=(x-3)(x-5)

(3)(x-y)(a-b)-(y-x)(a+b)
=(x-y)(a-b+a+b)
=2a(x-y)

(4)2(x+3)^2-x-3
=2x^2+12x+18-x-3
=2x^2+11x+15
=(2x+5)(x+3)

(1)ma-mb+nb-na
(2)x^2-8x+15
(3)(xa-xb-ya+yb)-(ya+yb-xa-xb)=xa-xb-ya+yb-ya-yb+xa+xb=2xa-2ya
(4)2x^2+11x+15

1.m(a-b)-n(a-b)=(m-n)(a-b)
2.x^2-6x+9-2x+6=x^2-8x+15=(x-3)(x-5)
3.(x-y)(a-b)+(x-y)(a+b)=2a(x-y)
4.2(x+3)^2-(x+3)=(x+3)[2(x+3)-1]自己把后面打开就好拉

1 .(m-n)(a-b) 3. 2a(x-y)
2 4 题目毛看懂啊··· 中间那个符号是什么意思~@？！

(a-b)(m-n)
(x-5)(x-3)
2a(x-y)
(2x+5)(x+3)