The simpler quadratic formula | Lockdown math ep. 1

From 3Blue1Brown.

Another view on the quadratic formula.
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Beautiful pictorial summary by @ThuyNganVu:

Po Shen Loh on quadratics:

Welch Labs on imaginary numbers:

Mistakes (there will always be mistakes):
At 22:00, I write "b’ / 2" instead of "-b’ / 2".


Music by Vincent Rubinetti.
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