求5x*x+5y*y+8xy-2y-2x+2=0的实数解
实数x'y满足x≥y≥1和2x^2-xy-5x+y+4=0求x'y的值
已知:实数x,y满足2x的平方+4xy+5y的平方-4x+2y+5=0 求x的y次方
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x、y为正实数,且2x+8y-xy=0,求x+y的最小值
已知X、Y为正实数,且2X+8Y-XY=0,求X+Y的最小值.
已知x、y属于正实数,2x+8y-xy=0,求x+y的最小值
x,y为正实数,且2x+8y-xy=0,求x+y的最小值
若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值
已知x+4y-2x+8y+5=0,求x^4-y^4/2x+xy-y·2x-y/xy-y÷(x+y/y)的值.
实数x y满足x≥y≥1和2x²-xy-5x+y+4=0求x+y之值
若实数XY满足方程X²-XY-2Y²+5x-4y+6=0试求x²+y²的最小值