已知非零有理数x,y满足x²-4xy+4y²=0,求(x-y)/(x+y)的值
已知非零有理数x,y满足x²-4xy+4y²=0,求(x-y)/(x+y)的值
已知非零实数x,y满足x²-4xy+4y²=0,求分式2x-y除以2x+y的值
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.
若有理数x、y满足|4-2x|+(Y-3X)²=0,则代数式x²-2xy+y²的值为
已知实数x、y满足5x²-3xy+1/2y²-2x+1/2y+1/4=0 求x、y的值
x²+y²+4x-8y+20=0,求分式x²-y²/xy的值
已知实数x,y满足x²+4y²=4.求f(x,y)=x²+2xy+4y²+x+2
已知实数满足x²+4y²=4x,求x²+y²的最值
已知x,y满足x²+y²+5/4=2x+y,求代数式(x+y)·xy的值.
.已知xy=8满足x²y-xy²-x+y=56,求x²+y²的值 2.若x-3=
已知:x²+y²+4x+6y+13=0 求:x²+y²的值
已知x/y=3,求x²+2xy-3y²/x²-xy+y²的值