数学填空题(最好有过程)
1.a+212.()X-Y
------=----------------=------------
a^3+8()X^3-Y^3X^2+XY+Y^2
3.若X^2+XY-2Y^2=0.则X^3-Y^3(X-Y)^2
---------/----------=()
X^3+Y^3X^2-Y^2