User talk:Kaysakado

Division by zero

Hi. I reverted your edit because the first line became $(x-y)x=x^{2}-y^{2}$ which seems confusing. If you insist, you may put it back again, but I then suggest you explain that you have to take $y=x$. Jesper Carlstrom (talk) 13:30, 11 January 2008 (UTC)