通分:x+4/x^2-8x+15,x-5/x^2+x-12,x-3/x^2-x-20
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/18 07:02:44
通分:x+4/x^2-8x+15,x-5/x^2+x-12,x-3/x^2-x-20
x^2-8x+15=(x-3)(x-5) x^2+x-12=(x-3)(x+4) x^2-x-20=(x-5)(x+4)
∴(x+4)/(x^2-8x+15)=(x+4)^2/(x-3)(x+4)(x-5)=(x^2+8x+16)/(x-3)(x+4)(x-5)
(x-5)/(x^2+x-12)=(x-5)^2/(x-3)(x+4)(x-5)=(x^2-10x+25)/(x-3)(x+4)(x-5)
(x-3)/(x^2-x-20)=(x-3)^2/(x-3)(x+4)(x-5)=(x^2-6x+9)/(x-3)(x+4)(x-5)
∴(x+4)/(x^2-8x+15)=(x+4)^2/(x-3)(x+4)(x-5)=(x^2+8x+16)/(x-3)(x+4)(x-5)
(x-5)/(x^2+x-12)=(x-5)^2/(x-3)(x+4)(x-5)=(x^2-10x+25)/(x-3)(x+4)(x-5)
(x-3)/(x^2-x-20)=(x-3)^2/(x-3)(x+4)(x-5)=(x^2-6x+9)/(x-3)(x+4)(x-5)
通分x+4/x*x+4x与x-5/x(x-5)-2(x-5)
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
通分:2x+2分之x+2,x²-x-2分之x,4x-8分之3
分式通分:x+1/3x,x/2x+6,x-1/x^2-9
1.通分3x/x+1,2x+6/x,x方-9/x-1
通分x+4/x的平方+4x与x-5/x(x-5)-2(x-5)
1-x/2x平方,x+1/3x平方(x-1),2x/5(x平方-1)通分
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