Hi, I am confused on Problem 10 in Chapter 5 of Strategy Guide in Algebra (Quadratic Equations). The problem asks What is x?
By combining both statements and applying quadratic formula we arrive at values of x being either -8 or 4. i would expect the correct answer to be C but it turns out to be E. Does this mean that since there are 2 possible values for x we cannot say what is the value of x? Mostly all quadratics will have 2 values so I'm bit confused here.
GMAT Forum
4 postsPage 1 of 1
- kapoor.sam
- Course Students
- Posts: 15
- Joined: Fri Jul 06, 2012 6:05 am
- tim
- Course Students
- Posts: 5665
- Joined: Tue Sep 11, 2007 9:08 am
- Location: Southwest Airlines, seat 21C
Re: Data Sufficiency and Quadratics
the information is only sufficient if it gives EXACTLY ONE answer to the problem. since you have two answers, that is not sufficient..
Tim Sanders
Manhattan GMAT Instructor
Follow this link for some important tips to get the most out of your forum experience:
https://www.manhattanprep.com/gmat/forums/a-few-tips-t31405.html
Manhattan GMAT Instructor
Follow this link for some important tips to get the most out of your forum experience:
https://www.manhattanprep.com/gmat/forums/a-few-tips-t31405.html
- kapoor.sam
- Course Students
- Posts: 15
- Joined: Fri Jul 06, 2012 6:05 am
Re: Data Sufficiency and Quadratics
Thank you Tim.
- tim
- Course Students
- Posts: 5665
- Joined: Tue Sep 11, 2007 9:08 am
- Location: Southwest Airlines, seat 21C
Re: Data Sufficiency and Quadratics
my pleasure..
Tim Sanders
Manhattan GMAT Instructor
Follow this link for some important tips to get the most out of your forum experience:
https://www.manhattanprep.com/gmat/forums/a-few-tips-t31405.html
Manhattan GMAT Instructor
Follow this link for some important tips to get the most out of your forum experience:
https://www.manhattanprep.com/gmat/forums/a-few-tips-t31405.html
4 posts Page 1 of 1