<PRE><B>Question 621715</B>
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The trick to not making errors on this one is to use a little substitution.  Let *[tex \LARGE x\ +\ y\ =\ a].


Then multiply *[tex \LARGE (a\ +\ 3)(a\ -\ 4)]


Once you have that product, put *[tex \LARGE x\ +\ y] back in place of *[tex \LARGE a], remembering that *[tex \LARGE a^2] will be equal to *[tex \LARGE x^2\ +\ 2xy\ +\ y^2].  Finally, collect any like terms.  Be careful with your signs.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
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