求方程5X^5-6xy+2y^2-4x+2y+1=0
求方程5X^5-6xy+2y^2-4x+2y+1=0
求方程5x²+6xy+2y²-4x+2y+1=0的实数根
若实数XY满足方程X²-XY-2Y²+5x-4y+6=0试求x²+y²的最小值
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*
已知x,y>0 2x+y+3=xy 求5x+4y最小值
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
已知关于x,y方程5x^2-3xy+1/2y^2-2x+1/2y+1/4=0求它的实数根
已知关于x,y方程5x^2-3xy+1/2y^2-2x+1/2y+1/4=0求它的实数根.
已知x>0,y>0,x+根号xy-6y=0,求4x+5根号xy-6y分之x+2根号xy
已知x+y=-1,xy=-2,求代数式-5(x+y)+(x-y)+x(xy+y)的值
已知x²+y²-2x+4y+5=0,求X^4-y^4/2x^2+xy-y²·2x-y/xy
已知x^3+xy^2+x+x^2y+y^3+y=0,求5x-6y/3x+4y的值.