已知x,y满足x²+4y²+2x-4y+2=0,则√5x²+16y²=
已知x,y满足x²+y²-4x+6y+13=0则(3x+y)²-(3x+y)(3x-y)的
已知实数x,y满足x²+y²+2x-4y+5=0 则(x+y)的二零一二次方=?
已知x²+4x+y²-2y+5=0,则x+y=
已知非零有理数x,y满足x²-4xy+4y²=0,求x-y/x+y-y-x/x+y的值.
已知实数x、y满足x²+y²+4x-6y+13=0
已知x²+y²+5=2x+4y,求【2x²-(x-y)(x-y)】【(x+y-1)(x-y
已知实数x,y满足x²+y²+4x-2y-4=0,则x²+y²的最大值为多少?
已知实数x,y满足5x²+2y²+1=6xy+4x-2y,则x²-xy+2000y
若实数X,Y满足X²+Y²+4X-2Y +1=0,则X²-6X+Y²-2Y的最大
已知实数x,y满足x²+y²-2x+4y=0,则x-2y的最小值域最大值是?
已知实数x、y满足x²+y²+2x-4y+5=0,试求x、y的值.
已知实数x,y满足x²+y²-xy+2x-y+1=0 求x y