Viewer's Request: Algebra #5: Prove Why Factoring by Grouping Works

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We will prove why factoring by grouping actually works. Of course we will also use the “foil method” to solve the same problem.

Next video in this series can be seen at:

[michaeltran]

It has been so long since forever the last time I touch some proper algebra. Your thumbnail just kicked some of those forgotten memories of mine when I do math homeworks. :)

Thanks for the video Mr. Biezen.

[chocolateangel]

Thanks for this. The trial-and-error approach is good for those with solid number sense -- and it also prevents you from having to work with large numbers (like you may have to when you multiply AC). When I can see the numbers are going to be manageable, though, I prefer doing a version of the AC method.

[محمدعليآلغبان-غف]

I like how patient you are with your students.. 😂💔

[محمدعليآلغبان-غف]

So it's just a postulate or it's a rule of structure just like it's what it's..

[ashnakamura]

This is not a proof. You've proofed A implies B, but you also need to proof B implies A