Lesson: Introduction to Algebra

IMPORTANT: Starting in "early" 2024 (the GMAT test-makers still aren't sure when exactly) the current version of the GMAT will be replaced by a very similar test called GMAT Focus. The GMAT Focus edition tests the same content the current edition tests, EXCEPT for Sentence Correction, Geometry and Analytical Writing. The format of the GMAT Focus is also a little different, the details of which can be found here. 

The layout of the course, including the Study Guide, will not be updated to reflect the upcoming changes to the test as Brent, the founder of GMAT Prep Now, has recently joined the team at Target Test Prep.  

That said, since our video course covers all of the content that will be tested on the Focus edition, it can still be used to prepare. The onus, however, will be on you to to familiarize yourself with the changes to the test which can be found here.   

Reinforcement Activities

Comment on Introduction to Algebra

R Moses - October 17, 2016
Do you guys sell any books that follow along with your video lessons?
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gmat-admin - October 17, 2016

No, we don't sell any books to accompany our lesson. However, we recommend that all test-takers get a recent copy of the Official Guide to GMAT Review (aka the OG).

rahul0chandran - July 6, 2017
Does it hurt my chances in any way if if follow OG15 and not the latest one ?
gmat-admin's picture

gmat-admin - July 7, 2017

The OG2015 is perfectly fine to use.

aladdin - November 7, 2017
Hi Brent,
If believe you made a small mistake in the last step of your answer here:
http://www.beatthegmat.com/og2016-ps-if-x-1-t296240.html
x = -1, then (x⁴ - x³ + x²)/(x - 1) = [(-1)⁴ - (-1)³ + (-1)²]/[(-1) - 1]
= [1 - (-1) + 1]/(-2)
= 1/(-2)
= -1/2

The addition [1 - (-1) + 1]/(-2) suppose to equal 3/(-2)--> -3/2
Sorry to mention that, but it could misslead or confuse some people.
Thanks
Aladdin
gmat-admin's picture

gmat-admin - November 8, 2017

Question link: http://www.beatthegmat.com/og2016-ps-if-x-1-t296240.html

Thanks Aladdin! I have edited my solution accordingly.

Cheers,
Brent

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