已知X、Y满足(X²+Y²+1)(X²+Y²-2)-4=0,求X²+Y
已知实数x,y满足x²+y²-xy+2x-y+1=0 求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+y²-2x+6y+10=0,求y∧-x.
已知实数x y满足x²+y²+2x-4y+1=0 求下列最大值和最小值,(1)y/x-4 (2)2x
已知x²+y²+5=2x+4y,求【2x²-(x-y)(x-y)】【(x+y-1)(x-y
已知x,y的值满足方程组x+2y=3,x-y=-2,求x/(x-y)²+x²-y²/(x+
已知x,y满足x(+1)-(x²+2y)=1,求x²+4xy+4y²-2x+4y的值.
已知实数X、Y满足X²+4y²+2x-4y+2=0 求X的2y次方+2x的值
已知实数x,y满足x²+y²+2x-2y=0,求x²+y²的最大值 x+y的最小
已知x,y满足x²+y²-4x-6y+13=0,求(- y/x^3)^3÷(- 1/xy)^4.(x
已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y²
1、已知实数x、x满足x²+y²-xy+2x-y+1=0,试求x、y的值.