化简x^2-4x+4/2x-4 3x^2-9x-12/x^2+2x+1 x^2-7x+12/-x^2+9x-20 xy-

来源：学生作业帮编辑：搜搜考试网作业帮分类：数学作业时间：2024/08/09 11:26:46

化简x^2-4x+4/2x-4 3x^2-9x-12/x^2+2x+1 x^2-7x+12/-x^2+9x-20 xy-x-y+1/y^2-2y+1
(1)x^2-4x+4/2x-4
(2) 3x^2-9x-12/x^2+2x+1
(3)x^2-7x+12/-x^2+9x-20
(4)xy-x-y+1/y^2-2y+1

(1)x^2-4x+4/2x-4
=(x-2)^2/2(x-2)
=x-2/2
(2)3x^2-9x-12/x^2+2x+1
=3(x^2-3x-4)/(x+1)^2
=3(x+1)(x-4)/(x+1)^2
=3(x-4)/x+1
(3)原式=(x-6)(x-1)/-(x-1)(x+10）
=x-6/-(x+10)
(4)原式=x(y-1)-(y-1)/(y-1)^2
=(x-1)(y-1)/(y-1)^2
=x-1/y-1
有不懂的可以追问,对答案满意请给个满意答案就行了.

|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| 化简x^2-4x+4/2x-4 3x^2-9x-12/x^2+2x+1 x^2-7x+12/-x^2+9x-20 xy- x*x+2x+x*x+10x+x*x+25+2x+x*x+1+1+16+x*x+4x*x+9-12x+16x*x+4-1 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1 设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10), （1） x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8 X+7/X+1+X+8/X+2-X+9/X+3-X+10/X+4 的解法约分 (X的平方+4x+3)(2x-x)^/(X^+X)(X^+X-6),