已知x,y均为实数,且满足XY+x+y=17,xy²+x²y=66,求x²+y²
已知x,y均为实数,且满足XY+x+y=17,xy²+x²y=66,求x²+y²
已知x,y均为实数,且满足xy+x+y=17,x^2y+xy^2=66,求x^2+y^2的值.
已知实数x,y满足x²+y²-xy+2x-y+1=0 求x y
已知x、y均为实数,且满足xy+x+y=17,x^2y+y^2x=66,求x^4+x^3y+x^2*y^2+y^3x+y
已知实数xy满足x²﹢y²-xy+2x-y+1=0求xy
已知x、y均为实数,且满足xy+x+y=17,x2y+xy2=66,求x2+y2
已知实数xy,满足10x²-2xy+y²+6x+1=0,求x+y
已知实数x、y满足x²y+xy²=20,xy+x+y=9,求x²+y²的值.
已知实数x,y满足5x²+2y²+1=6xy+4x-2y,则x²-xy+2000y
已知xy为实数,且y=√x-½+√½-x+½,求5x+|xy-1|-√y²-2y
已知xy都是正实数且满足4x²+4xy+y²+2x+y-6=0则x(1-y)的最小值
x和y都是实数,且满足xy(x²-y²)=x²+y²,求x²+y