x+y=5,则[-(x^2-y^2)/2xy)]^2除以(x-y/-xy)^2的值是多少?
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/09 22:53:25
x)Ю5y13Z8#8{:**Tl˙K^
ԭ=aϳ.tD{"}_`gC]m5XF[ &pk u$47@]%\@q|
d!BF@~qAb4lhb
9He3iϴlޜ';vi ##R&87~H8)h)*+C';g JAd*`6V #N
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
x(x-2y)=y(2y-x) ,则y分之x是多少
(5)若x/2=y/3(y不为0)则x/y=____,x+y/y=___,y/x-y=___.
已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
(x-y-5)^2+|x+6y+2|=0,则x-y^2=
若(5x+y)/(7x+10y)=1/2则x/y=
(x-5y)/(y-2x)=3,则y:x=
分式的加减:[(x/y-y/x)除以(x+y)+x(1/y-1/x)]除以1+x/y,其中x=5,y=2
先化简,再求值 [2/3x - 2/x+y(x+y/3x -x-y)]*x/x-y,其中5x+3y=0
.先化简再求值:(2x+y)(2x+y)-(2x-y)平方其中X,Y满足X平方+Y平方-2X+4Y+5=0
若x+y=4,则多项式1/2(x+y)+4(x-y)-3(x-y)-3/2(x+y)-x+y值是()
已知方程组{(X+Y)-3(X-Y)=7,2(X+Y)+(X-Y)=-7}则(X+Y)(X-Y)=
若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值
若x,y互为相反数(y≠0),则2x+5+2y+3x/y=____
2(x-y)=5y,x-y=-5
若x-y不等于0,2x-3y=0,则分式(10x-11y)/(x-y)的值是()?(10x-11y)/(x-y) =[(8x-8y)+(2x-3y)]/(x-y) =8为什么8X-8Y=8?(10x-11y)/(x-y)=[(8x-8y)+(2x-3y)]/(x-y)=8+(2x-3y)]/(x-y)=8+0=8