x2+y2-4x-6y+13=0求分式y2-x2*xy
已知x2+4y2+x2y2-6xy+1=0,求 x4-y4/2x-y 乘 2xy-y2/xy-y2 除以(x2+y2/x
已知x2+y2-4x+6y+13=0,求x2-6xy+9y2的值.
X2+Y2+8X+6Y+25=0 求代数式(x2-4y2/x2+4xy+4y2)-x/x+2y
已知X2+Y2+8X+6Y+25=0 求代数式X2++XY+4Y2分之X2-4Y2 减X+2Y分之X的值
若X2+Y2-2X-6Y+10=0 ,求(x2-y2)/xy的值
1.已知X2+Y2-4X-6Y+13=0,求Y2-X2的值
已知x2-4x+y2-6y+13=0求x2+y2的值?
若x2次方+y2次方+4x—8y+20=0,求分式xy分之x2次方—y2次方大神们帮帮忙
已知x2+y2+4x-6y+13=0 求x2-2x\x2+3y2
已知X2-2x+y2+6y+10=0,求(x2-2xy)/(xy+y2)的值
已知x2-4xy+4y2=0,那么分式x-yx+y
已知x2+y2-2x-4y+5=0,分式yx−xy