(x-y+4xy/x-y)(x+y-4xy/x-y)
{x-y+(4xy/x-y)}{x+y-(4xy/x+y)}怎么解?
x^2y+4xy+4y
怎么化简(x-y+4xy/x-y)(x+y-4xy/x+y)(/是分数线)
(x^-4y^)/(x^+2xy+y^)/(x+2y)/(2x^+2xy)
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
xy-1+x-y
3x²y+xy²-[2xy²-4x²y+(x²y-2xy²)
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
x²/xy-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)?
计算:4xy-(x+y)^2/xy(x+y)(x-y)÷x^2+xy-2y^2/x^2y+2xy^2
x根号x+x根号y/xy-y^2)-(x+根号xy+y/x根号x-y根号)y