(4x*2-y*2)除以4x*2-4xy+y*2\2x-y
已知X+Y=2XY,求4X-5XY+4Y 除以X+XY+Y 的值
x平方+y平方+2xy分之x平方-4y平方除以x平方+xy分之2y+x
x-2y分之x-y除以x^2-4xy+4y^2分之x^2-y^2
{(z+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y
已知x+y=6,xy=-2,求(x^4-y^4)除以x^2+y^2/xy乘以(6x+6y)的值.
若(2x-14xy-2y)除以(x-2xy-y)=4,则1/x-1/y=
已知:3x方+xy-2y方=0,求(x+y/x-y + 4xy/y方-x方)除以 x方+2xy-3y方 / x方-9y方
x^2y+4xy+4y
2x+y分之4x²-4xy+y²除以(4x²-y²)化简
(x/x+y +2y/x+y)乘以xy/ x+2y除以(1/x+1/y)(2)(3x^2/4y)^2乘以2y/3x+ x
(x^-4y^)/(x^+2xy+y^)/(x+2y)/(2x^+2xy)
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?