求方程XX-XY-5X+5Y-1=0XX是X的平方!写出你的解题过程说明~·

求方程XX-XY-5X+5Y-1=0XX是X的平方!写出你的解题过程说明~· x,+y=5 xy=3 求xx+yy 已知x(x-1)-(xx-y)=-3求xx+yy-2xy 已知x（x+1)-(xx+y)=3,求(xx+yy)/2-xy的值 x(x+1)-(xx+y)=-3,求(xx+yy)/2-xy的值 已知x,y是实数,且适合方程(xx+xy-12)(xx+xy-12)+(xy-2yy-1)(xy-2yy-1)=0求x,y的值 求{5x-3y+z= -2 ,5x+2y-4x=3 ,-5x+y-z=2}方程组的解由1+2,得即由2+3,得把xx=XX代入1,得把xx=xx,xx=xx代入1,得所以,原方程的解是 知x/3=y/4=z/5,求(xy+yz+xz)/xx+yy+zz x+y+z=5,xx+yy+zz=6,求xy-xz-yz的解越快越好 已知X+Y=1.XY=1/5,求（XX+1）（YY+1）的值 若xx+yy-2x-6y+10=0,求分式（xx-yy）/xy的值. 已知2x=3y,求xy/xx+yy-yy/xx-yy的值 解方程1/(xx+x)+1/(xx+3x+2)+1/(xx+5x+6)+1/(xx+7x+12)+1/(xx+9x+20)=5/(xx+11x-7 解方程1/(xx+x)+1/(xx+3x+2)+1/(xx+5x+6)+1/(xx+7x+12)+1/(xx+9x+20)=5/(xx+11x-708） xx+2xy+yy=1 xx-2xy+yy=49 求xx+yy,xy. 已知xx+y=5,xy=-3,则x^2y+xy^2= 若x+y=-1,xy=5,则xx+yy= 解方程：3x/(xx-1)+（xx-1）/3x=5/2