Let a,b and c be nonzero real numbers such that 1a+1b+1c=0. Compute bca2+acb2+abc2.
To be honest, I would just plug in values.
Let a = 2, b = 2, and c = -1.
Then simply solve.
Systematic way as follows:
(However, CoolStuffYT's way works as well!)
Thanks Alan,
I was wondering how to do that one formally.
Thanks Coolstuff too :)
+1252 
