We derive an alternative version of the quadratic formula, then explore advantages and disadvantages of each version. This includes values for which they are defined, and the effect of rounding on the accuracy of solutions.
00:00 Intro
00:19 Derivation 1
02:29 Derivation 2
04:55 Problems with the original formula
07:40 Problems with the new formula
11:31 Comparison of accuracy
14:17 Why you should use both