若x2-y2=12,x y=6,则x=,y=
我做对了吗.x2(x-y)+y2(y-x)= x2(x-y)-y2(x-y)=x2-y2=(x+y)(x-y)
若实数x,y满足3x2+2y2=6x,则x2+y2的最大值为______.
若X2+Y2-2X-6Y+10=0 ,求(x2-y2)/xy的值
x2-x-y2-y 解法:=(x2-y2)-(x+y) =(x+y)(x-y)-(x+y) =(x+y)(x-y-1)
若x-y=2,x2-y2=10,则x+y= ___ .
若x2-y2=100,x+y=-25,则x-y的值是( )
已知x2-y2=6,x-y=1,则x+y等于( )
已知实数x,y满足关系式x2+y2-6x-4y+12=0
若x2-2x+10+y2+6y=0,求(2x+y)2
若x2-2x+y2+6y+10=0,求x,y的值
X×Y=6,X2+Y2=16,则X=?,Y=?,或者X+Y=?
已知实数x,Y满足x2+y2+4x-6y+13=0,则x(-Y)=