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 April 14th, 2018, 08:15 AM #1 Newbie   Joined: Apr 2018 From: India Posts: 6 Thanks: 0 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.
 April 14th, 2018, 08:48 AM #2 Math Team   Joined: Dec 2013 From: Colombia Posts: 7,445 Thanks: 2499 Math Focus: Mainly analysis and algebra 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. Thanks from topsquark and JeffM1
 April 14th, 2018, 09:00 AM #3 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,308 Thanks: 935 No such animal as "no time". Btw, are you spamming: you posted that twice...
April 14th, 2018, 09:04 AM   #4
Senior Member

Joined: May 2016
From: USA

Posts: 1,148
Thanks: 479

Quote:
 Originally Posted by Denis 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.

April 14th, 2018, 09:07 AM   #5
Senior Member

Joined: May 2016
From: USA

Posts: 1,148
Thanks: 479

Quote:
 Originally Posted by v8archie 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.

April 14th, 2018, 10:16 AM   #6
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Joined: Dec 2006

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Quote:
 Originally Posted by Denis . . . you posted that twice...
I've removed the first copy.

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