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-
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:2024/07/06 21:30:02
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-y平方/x(y-x)
还有:先化简再求值:
(1)2x/x平方y平方 + x/y平方-x平方 + y/(x-y)(x+y) 其中x=4 y=-3
(2)已知(3a-2b)(a-b)=0,求a/b-b/a-a平方+b平方/ab
在此感谢、
还有:先化简再求值:
(1)2x/x平方y平方 + x/y平方-x平方 + y/(x-y)(x+y) 其中x=4 y=-3
(2)已知(3a-2b)(a-b)=0,求a/b-b/a-a平方+b平方/ab
在此感谢、
![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-](/uploads/image/z/1611186-42-6.jpg?t=%E9%80%9A%E5%88%86%E8%AE%A1%E7%AE%97%EF%BC%9A%EF%BC%881%EF%BC%892x-3%2F%28x-1%29%28x-4%29+-+x-2%2F%281-x%29%284-x%29+%EF%BC%882%EF%BC%89x%E5%B9%B3%E6%96%B9-y%E5%B9%B3%E6%96%B9%2Fxy+-+xy-)
(1)2x-3/(x-1)(x-4) - x-2/(1-x)(4-x)
=(2x-3)/(x-1)(x-4) - (x-2)/(x-1)(x-4)
=(2x-3-x+2)/(x-1)(x-4)
=(x-1)/(x-1)(x-4)
=1/(x-4)
(x^2-y^2)/xy - (xy-y^2)/x(y-x)
=(x^2-y^2)/xy +y(x-y)/x(x-y)
= (x^2-y^2)/xy +y/x
=(x^2-y^2+y^2)/xy
=x^2/xy
=x/y
(1)2x/x^2y^2 + x/(y^2-x^2) + y/(x-y)(x+y)
=2x/x^2y^2 - x/(x-y)(x+y) + y/(x-y)(x+y)
=2x/x^2y^2 -( x-y)/(x-y)(x+y)
=2/xy^2-1/(x+y)
x=4 y=-3
原式=2/xy^2-1/(x+y)=2/4*9-1/(4-3)=-17/18
=(2x-3)/(x-1)(x-4) - (x-2)/(x-1)(x-4)
=(2x-3-x+2)/(x-1)(x-4)
=(x-1)/(x-1)(x-4)
=1/(x-4)
(x^2-y^2)/xy - (xy-y^2)/x(y-x)
=(x^2-y^2)/xy +y(x-y)/x(x-y)
= (x^2-y^2)/xy +y/x
=(x^2-y^2+y^2)/xy
=x^2/xy
=x/y
(1)2x/x^2y^2 + x/(y^2-x^2) + y/(x-y)(x+y)
=2x/x^2y^2 - x/(x-y)(x+y) + y/(x-y)(x+y)
=2x/x^2y^2 -( x-y)/(x-y)(x+y)
=2/xy^2-1/(x+y)
x=4 y=-3
原式=2/xy^2-1/(x+y)=2/4*9-1/(4-3)=-17/18
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-
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
x(x-1)-(x平方-y)=-3,求x平方+y平方-2xy
[3xy(1-x)-6xy(x-1/2)]*2x*(-xy)平方,x=-1 y=2 ; 3xy平方(-1/3x平方y+4
分数的乘除计算(xy-x的平方)÷xy分之x-y(x的平方+x分之4x的平方-1)乘(1-2x分之x+1)÷x分之1x-
5xy平方-2x平方y+[3xy平方-(4xy-2x平方y-2x平方y)],其中x=-2,y=-1求值
1.(2x/x平方-1)-(1/x-1) 2.(xy-x的平方)除以(x的平方-2xy+y的平方/xy)×(x-y /
计算:(1)x-y分之2x的平方-y-x分之x的平方-4xy+x-y分之2y的平方-x的平方
2(x的平方y+xy)-3(x的平方y-xy)=4x的平方y 其中x=1 y=-1
化简求值:2(x的平方y+xy)-3(x平方y+xy)-4x平方y,其中x=-1,y=2
(2X平方y+3xy平方)-(6x平方-3XY平方)(计算)
计算4xy+(x-2y)的平方+(x+3y)(3y-x)