Ronn!Blankenship wrote: > >> Who somehow did memorize the quadratic formula... > > Can you derive it? > Trivial. I ddn't memorize Cardano's formula, but I can derive it easily: eliminate term in x^2, x = u + v then eliminate term with uv.
OTOH, I have a hard time remembering some obscure geometry formulas, even simple ones like a^2 = b^2 + c^2 - [or +?] 2 [?] b c cos [or sin?] A Alberto Monteiro _______________________________________________ http://www.mccmedia.com/mailman/listinfo/brin-l
