已知y=根号下(x-4)+根号下(4-x)+3,求代数式(x-y+4xy/x-y)(x+y-4xy/x+y)?
已知y=根号下(x-4)+根号下(4-x)+3,求代数式(x-y+4xy/x-y)(x+y-4xy/x+y)?
已知x、y满足根号下4x-5y+根号下x-y-1=0,则根号下xy-根号下x/y
已知xy都是实数,且Y=根号下X+根号下-X+4,求X+Y的平方根.
已知[x+根号下(x^2+2008)][y+根号下(y^2+2008)]=2008,求x^2-3xy-4y^2-6x-6
已知X—根号3XY-4Y=0,求(2X+3根号XY-2Y)/(3X-根号XY+Y)的值
已知(4x-y-1)²+根号下x+y-2=0 求4x²y-4xy-xy²
已知y=(根号x-4)+(根号4-x)+2,求 (根号xy^3)
已知xy为实数,且满足(x+y-根号3)²与根号下(2x-y)互为相反数,求8x²+4y²
已知正实数x y满足x-根号xy-2y=0求 x+3根号xy+2y/2x-2根号下xy-y
已知|3x+2y|=0,根号下(2x-3y+13)等于0,求x^2-3xy-4y^2 已知|x+y|+(2x-y+3)^
已知x+y=5 xy=3 求根号下y/x+根号下x/y
已知x+y=5,xy=3,求根号下x/y+根号下y/x的值