4x^2-4xy+y^2/2x+y除以(4x^2-y^2)
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
若(2x-14xy-2y)除以(x-2xy-y)=4,则1/x-1/y=
x^2y+4xy+4y
(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?
已知A除以x²+4xy+4y²分之x²-y²=x+2y分之x+2y,当x=2,y
已知x+y除以xy等于4,求2x-5xy+2y除以x+2xy+y的值
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.
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