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April 14th, 2018, 08:15 AM   #1
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Lightbulb Solve quadratic equation in no time

Solve quadratic equation in no time
$$ax^2+bx+c=0\implies x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$$

Last edited by greg1313; April 14th, 2018 at 01:37 PM.
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April 14th, 2018, 08:48 AM   #2
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The quadratic equation gives, of itself, zero understanding of the ideas an concepts of solving general polynomial (and other) equations, which is the whole point of teaching the other methods.
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April 14th, 2018, 09:00 AM   #3
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No such animal as "no time".

Btw, are you spamming: you posted that twice...
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April 14th, 2018, 09:04 AM   #4
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Quote:
Originally Posted by Denis View Post
No such animal as "no time".

Btw, are you spamming: you posted that twice...
Oh he is most definitely spamming. The video ends with the message "please subscribe."

I have reported it.
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April 14th, 2018, 09:07 AM   #5
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Quote:
Originally Posted by v8archie View Post
The quadratic equation gives, of itself, zero understanding of the ideas an concepts of solving general polynomial (and other) equations, which is the whole point of teaching the other methods.
The difference between a crammer and a teacher: one gives formulas to memorize whereas the other gives concepts to understand.
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April 14th, 2018, 10:16 AM   #6
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Quote:
Originally Posted by Denis View Post
. . . you posted that twice...
I've removed the first copy.
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