作业帮化简并求值(x-y分之1 x y分之1)除以x的平方-y的平方分之2x-y
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/30 02:33:32
若X方-2XY+Y方+1XY-11=0则：x-y=0.而且xy=1所以,x=y=1,或者,x=y=-1所以,x/y=1X方+6XY+9Y方分之X方-25Y方*5X-25Y分之X+3Y=（x²
x^2+2xy+y^2/x^2-y^2除以x^2+xy/xy-y^2=(x＋y)²／(x＋y)(x－y)÷x(x＋y)／y(x－y)=(x＋y)／(x－y)×y(x－y)／x(x＋y)=y／
因为x=1+根号2y=1减根号2所以xy=1+根号2乘以1减根号2=1-2=-1x+y=2所以可以求得,原式=xy/(x+y)=-1/2
所求之数值是1.[(xy+2)(xy-2)-(xy+2)²+8]÷(2x)={(xy+2)[(xy-2)-(xy+2)]+8}/(2x)=[(xy+2)(xy-2-xy-2)+8]/(2x)
[1/(x-y)-1/(x+y)]÷2y/(x^2-2xy+y^2)=[(x+y)/(x+y)(x-y)-(x-y)/(x+y)(x-y)]÷2y/(x-y)^2=[(x+y-x+y)/(x+y)(x
原式=x²-2xy+y²-4x²+y²-4x²-2xy=-7x²-4xy+2y²=-7+1+1/8=-47/8a=1,b=-2原式
[(xy+2)(xy+2)-2(xy+1)+2]÷(xy)=[(xy+2)(xy+2)-2xy-2+2]÷(xy)=[(xy+2)(xy+2)-2xy]÷(xy)=[(xy)^2+4xy+4-2xy]
(xy-x的平方）除以xy分之x的平方-2xy+y的平方乘x的平方分之x-y=x(y-x)*xy/(x-y)²*（x-y）/x²=-y再问：不好意思，打错了(xy-y的平方）除以x
xy-2{xy-[3x²y-(xy²+0.5xy)]+4x²y}=xy-2[xy-(3x²y-xy²-0.5xy)+4x²y]=xy-2(x
X+Y=-4.(X+Y)^2=X^2+Y^2+2XY=16.XY=-12.X^2+Y^2=40.Y+1/X+1+X+1/Y+1=(Y+1)^2+(X+1)^2/(X+1)(Y+1)=自己乘开就行,再把
解3x²y-[2xy-2(xy-3/2x²y)+xy]+3xy²=3x²y-(2xy-2xy+3x²y+xy)+3xy²=3x²y
=[x^2-4xy+4y^2-x^2-4xy+3xy]/(-2y)=(-5xy+4y^2)/(-2y)=（-5x+4y）/(-2)代入数据即可解出你所需的答案再问：请问/是什么？再答：/代表除号谢谢不
原式=（4xy+x²-2xy）/(x-2y)÷(x+2y)²/x²（4x-y）=x(x+2y)/(x-2y)÷(x+2y)²/x²（4x-y）=x&#
(xy-x²)÷(x²-2xy+y²)/(x-y)×(x-y)/x²=-x(x-y)÷(x-y)²/x²=-x(x-y)×x²/(
[4(xy-1)^2-(xy+2)(2-xy)]除以4分之1xy=[4x^2乘以y^2-8xy+4-(4-x^2y^2)]除以4分之1xy=(4x^2乘以y^2-8xy+4-4+x^2y^2)除以4分
解∵x=y=1/29x²-12xy+4y²+12xy-4x²-9y²=(9x²-4x²)+(12xy-12xy)+(4y²-9y&
您好：x²-2xy+y²分之（x-y）²=(x-y)²/(x-y)²=1不明白,可以追问如有帮助,记得采纳,谢谢祝学习进步!
X=-1/2Y=-2/3解=-5/9不知道对不对=.=!
2分之1x的平方y-3分之1xy-0.5x的平方y+0.5xy=6分之1xy=6分之1*3*(-2)=-1