x^2+y-4=0,求x*y

已知x*x-4xy+4y*y=0求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?已知x*x-4xy+4y*y=0求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的

x*x+y*y-2x+4y+5=0求x,x*x+y*y-2x+4y+5=0求x,x*x+y*y-2x+4y+5=0求x,X=1y=-2原式=(x-1)^2+(y+2)^2=0X=1Y=-4x^2+y^

若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(

x^2+4y^2-6x+4y+10=0,求x^4-y^4/(x+2y)(x-2y)*x+2y/xy^2+y^3除以（x^2+y^2/y)^2的值x^2+4y^2-6x+4y+10=0,求x^4-y^4

已知x^2+y^2-6x+4y+13=0,求(2x-y)^2-2(2x-y)(x+2y)+(x+2y)^2的值已知x^2+y^2-6x+4y+13=0,求(2x-y)^2-2(2x-y)(x+2y)+

已知x^2+y^2-6x-4y+13=0,求(2x-y)^2-2(2x-y)(x+2y)+(x+2y)^2的值是-4y别到处复制给我已知x^2+y^2-6x-4y+13=0,求(2x-y)^2-2(2

已知x^2+y^2+13-4x+6y=0,求(2x-y)^2-2(2x-y)(x+2y)+(x+2y)^2已知x^2+y^2+13-4x+6y=0,求(2x-y)^2-2(2x-y)(x+2y)+(x

x+y-1>=0,x-y+1>=0,4x+y-2>=0.实数x,y满足约束条件,求x-y/x+y取值范围x+y-1>=0,x-y+1>=0,4x+y-2>=0.实数x,y满足约束条件,求x-y/x+y

已知x^2-8x+y^2-y+16又1/4=0,求[(x+y)(x-y)-(x+y)^2-2y(x-3y)]÷4y的值已知x^2-8x+y^2-y+16又1/4=0,求[(x+y)(x-y)-(x+y

已知X.x+y.y-4x+2y+5=0,求4X.X-12XY+9Y.y的值已知X.x+y.y-4x+2y+5=0,求4X.X-12XY+9Y.y的值已知X.x+y.y-4x+2y+5=0,求4X.X-

{x+2y+2=0{7y-4y=-41求X和Y{x+2y+2=0{7y-4y=-41求X和Y{x+2y+2=0{7y-4y=-41求X和Y7y-4y=-41,3y=-41,y=-41/3x=-2-2y

如果|X|=4|Y|=2且|X+Y|=X+Y求X+Y如果|X|=4|Y|=2且|X+Y|=X+Y求X+Y如果|X|=4|Y|=2且|X+Y|=X+Y求X+Y(1)x=4,y=2时,|x+y|=x+y=

x^2-x+y^2+2y+5/4=0求x^-1+y^0x^2-x+y^2+2y+5/4=0求x^-1+y^0x^2-x+y^2+2y+5/4=0求x^-1+y^0(x²-x+1/4)+(y&

已知4x^2+y^2-4x+4y+5=0,求x,y已知4x^2+y^2-4x+4y+5=0,求x,y已知4x^2+y^2-4x+4y+5=0,求x,y(4x^2-4x+1)+(y^2+4y+4)=0(

已知x^2+4y^2-4x+8y+8=0,求x+y已知x^2+4y^2-4x+8y+8=0,求x+y已知x^2+4y^2-4x+8y+8=0,求x+y(x²－4x＋4)＋(4y²＋

x+2y+2=07x-4y=-41求x和yx+2y+2=07x-4y=-41求x和yx+2y+2=07x-4y=-41求x和y我提供2种解法给你吧!我想对你以后学习会有帮助!

3x+4y-5=0x^2+y^2=1求x.y3x+4y-5=0x^2+y^2=1求x.y3x+4y-5=0x^2+y^2=1求x.y{3x+4y-5=0（1）x^2+y^2=1（2）由（1）x=（5-

x>0Y>0x+y=2求1/x+4/y的最小值x>0Y>0x+y=2求1/x+4/y的最小值x>0Y>0x+y=2求1/x+4/y的最小值x+y=21/x+4/y=(1/2)(2/x+8/y)=(1/

若2x-3y=0,求5x+4y/3x-2y若2x-3y=0,求5x+4y/3x-2y若2x-3y=0,求5x+4y/3x-2y2x-3y=02x=3yx=1.5y5x+4y/3x-2y=7.5y+4y

已知：x^2+y^2+4x-6y+13=0,求x^y值.已知：x^2+y^2+4x-6y+13=0,求x^y值.已知：x^2+y^2+4x-6y+13=0,求x^y值.x^2+y^2+4x-6y+13