(x+y)(x-2y)+(x-y)^2 -(6x^2-3xy^2)/(3y)
x根号x+x根号y/xy-y^2)-(x+根号xy+y/x根号x-y根号)y
已知xy=2,x-y=3,求(x+y)(x-y)-y^2-(6x^2y-2xy^2)/2y的值.
已知xy=-2,x-y=3,求(x+y)(x-y)-y平方+(x-y)平方-(6x2y-2xy平方)/2y的值
初中数学分式已知x/y=2,求(x*x-xy+3y*y)/x*x+xy+6y*y的值
x+y 3次方 公式是不是 = (x+y)(x^2-xy+y^2)?
计算4xy+(x-2y)的平方+(x+3y)(3y-x)
(x+y)(x-y)+(x-y)的平方-(6X的平方Y-2XY的平方)/2Y
2x²-3xy=y²=0(x,y不得o)求x/y+y/x
计算:3xy[2xy-x(y-2)+x]
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
已知;x+y=4,x-y的绝对值=6,求xy(y的平方+y)-y的平方(xy+2x)-3xy
化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)