若非零复数 x,y 满足 x² + xy + y² = 0,则(x/x+y)^2011+(y/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-xy+2x-y+1=0 求x y
已知非零实数x、y满足x-5(√xy)-6y=0,则x/y
x>1,y>0,且满足xy=x^y,x/y=x^3y,求x+y
x²/xy-x/y
若正数x,y满足x²-y²=2xy,求(x-y)/(x+y)的值
正数x,y满足x²-y²=2xy,求x-y/x+y的值
已知有理数x,y满足xy=4,x+y=7,则x²y+xy²=()?
已知x,y满足x²+y²-4x+6y+13=0则(3x+y)²-(3x+y)(3x-y)的
若非零有理数x,y,z满足x+y+z=0,求证√1/x²+1/y²+1/z²为有理数
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+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)