已知实数x和y满足5x方-3xy+1/2y方-2x+1/2y+1/4=0 求x与y的值
已知实数x和y满足5x方-3xy+1/2y方-2x+1/2y+1/4=0 求x与y的值
已知实数xy满足x方+y方=1求y+2/x+1的取值范围
实数x、y满足2x方-2xy+y方+2x+1=0,求x-y的值
已知实数x y满足条件|2x-3y+1|+(x3y+5)的二次方=0求式子(-2x*y)的二次方(-y的二次方)×6xy
化简求值,若X方-2XY+Y方+1XY-11=0,求X方+6XY+9Y方分之X方-25Y方*5X-25Y分之X+3Y的值
若两个正实数x,y满足x方+2xy-3y方=0,求x方+xy+y方除以x方-xy+y方的值
已知x,y满足方程组x方+2y=5,x-y=-1求代数式x+y分之x的三次方-xy方÷x分之x方-2x
已知实数x,y满足5x^2-3xy+1\2y^2-2x+1\2y+1\4=0,求x,y的值
已知实数x、y满足5x²-3xy+1/2y²-2x+1/2y+1/4=0 求x、y的值
已知3X方-xy-4y方=0,求分式xy-3x方/2y方-5xy-3x方的值
6已知x+y=2,x-y=1,求分式x方2xy+y方分之x方-y方的值.
实数x'y满足x≥y≥1和2x^2-xy-5x+y+4=0求x'y的值