x+2/(x-4)(x-3),-2x/(4-x)(3-x) 通分
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/09/30 16:33:29
x+2/(x-4)(x-3),-2x/(4-x)(3-x) 通分
x+2/(x-4)(x-3)=A/(x-4)+B/(x-3)
A+B=2
-3A-4B=2
(1)*3+(2)
B=-8
A=10
则x+2/(x-4)(x-3)=10/(x-4)-8/(x-3)
-2x/(4-x)(3-x) =A/(4-x)+B/(3-x)
3A+4B=0
A+B=2
(1)-(2)*3
B=-6
A=8
则-2x/(4-x)(3-x) =8/(4-x)-6/(3-x)
再问: 0 0····那个是逗号、、不是一个相减的式子·········x+2/(x-4)(x-3)和 -2x/(4-x)(3-x) 通分……orz
再答: x+2/(x-4)(x-3)-2x/(4-x)(3-x) =x+2/(x-4)(x-3)-2x/(x-4)(x-3) =(x+2-2x)/(x-4)(x-3) ==(2-x)/(x-4)(x-3)
A+B=2
-3A-4B=2
(1)*3+(2)
B=-8
A=10
则x+2/(x-4)(x-3)=10/(x-4)-8/(x-3)
-2x/(4-x)(3-x) =A/(4-x)+B/(3-x)
3A+4B=0
A+B=2
(1)-(2)*3
B=-6
A=8
则-2x/(4-x)(3-x) =8/(4-x)-6/(3-x)
再问: 0 0····那个是逗号、、不是一个相减的式子·········x+2/(x-4)(x-3)和 -2x/(4-x)(3-x) 通分……orz
再答: x+2/(x-4)(x-3)-2x/(4-x)(3-x) =x+2/(x-4)(x-3)-2x/(x-4)(x-3) =(x+2-2x)/(x-4)(x-3) ==(2-x)/(x-4)(x-3)
通分x+4/x*x+4x与x-5/x(x-5)-2(x-5)
数学分式通分1/ac;1/2b[通分]1/x-1;4/x^2-1[通分]3/x-2;2/6-3x[通分]1/(x+1)(
通分:2x+2分之x+2,x²-x-2分之x,4x-8分之3
1/2x+3,2/3-2x.2x+5/4x^2-9通分
通分1/x平方-y平方和1/x平方+xy 通分x/x平方-4和x-1/(x-2)平方 通分2/3-2X和2x+5/4x平
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1/(x^2+3x+2) +1/(x^2+5x+6) + 1/(x^2+4x+3) 3/(x+1)(x+3)
通分3/2x²与2/x²-x
通分:4-2x分之1 x的平方-4分之x x的平方-4x+4分之3
x²-3x+2分之4x ,x-1分之1 ,x-2分之1 怎么通分?
通分计算:(1)2x-3/(x-1)(x-4) - x-2/(1-x)(4-x) (2)x平方-y平方/xy - xy-