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Sivasubramaniam Sivakumar said:

Nice!

I would never thought of this:

This is of the form \( 2(3a^2b + b^3) \) where \( a = y \) and \( b = 3. \) Now \( 2(3a^2b + b^3) = (a + b)^3 - (a - b)^3. \)
19 Jan 2011 17:38 GMT (#1 of 1 comment)
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