{(x-2y)^2-4y^2+2xy}÷2x
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{(x-2y)^2-4y^2+2xy}÷2x
{(x-2y)^2-4y^2+2xy}÷2x
{(x-2y)^2-4y^2+2xy}÷2x
{(x-2y)^2-4y^2+2xy}÷2x
=(x^2-4xy+4y^2-4y^2+2xy)÷2x
=(x^2-2xy)÷2x
=x/2-y
计算:4xy-(x+y)^2/xy(x+y)(x-y)÷x^2+xy-2y^2/x^2y+2xy^2
(x^2-xy)y÷y-x/xy怎么做?
因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y)
(x+y)(x+y+2xy)+(xy+1)(xy-1)(x+y)(x-y)+4(y-1)
计算:2xy/(x+y)².(x+y)/4y
计算(xy-y^2)÷x-y/xy
(x^2+2xy+y^2-4xy)*(x^2-2xy+y^2+4xy)
化简求值x-4y/2x-7xy+3y×x-2xy-3y/2x+3xy-2y÷3x-6y/4x-4xy+y,其中:x=1999,y=-1
x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x²
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
(-x-y)(x^2+xy+y^2)
(xy-x²)÷(x²-2xy+y²/xy)×(x-y/x²)
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
化简x^-y^/x^-2xy+y^
2*(x-y)²(y-x)(xy)
(x^-4y^)/(x^+2xy+y^)/(x+2y)/(2x^+2xy)
因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6
((xy+2)(xy-2)-2x²y²+5(xy-y)²)÷(2xy)