若(x^2)-6x+(y^2)+4y+13=0
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.
.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
已知x^2+y^2-4x+6y+13=0求(xy+y^2/5x^2-5xy+xy+y^2)·(5/x+y)-(y/x-y
若实数x、y满足x平方+y平方-4x-2y+5=0,求根号8y-2x分之(根号x)+y
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
化简求值:已知x、y满足:x2+y2-4x+6y+13=0,求代数式(3x+y)2-3(3x-y)(x+y)-(x-3y
如果x²+y²-4x+6y+13=0,那么2x+3y=()
已知:x2+4x+y2-6y+13=0,求(x-2y)/(x²+y²)
若X-2Y+6+(X+Y+12)²=0,求4X+ 5Y的值
若|5x+2y-12|+(3x+2y-6)(3x+2y-6)=0,则2x+4y=