Math Arguments
180 Days of Ideas for Discussion in Math Class. (as of 9July2014, we're in overtime!)
Saturday, August 22, 2015
489: Which Quadratic Formula?
So ... I've seen a couple of YouTube videos that feature songs about the Quadratic Formula. I often see it written like this:
$x = \dfrac{-b \pm \sqrt{b^2-4ac}}{2a}$
and it occurs to me that I've always written it this way:
$x = \dfrac{-b}{2a} \pm \dfrac{\sqrt{b^2-4ac}}{2a}$
Which one is better?
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