BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Gmat prep - xy plane question

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
User avatar
Legendary Member
Posts: 682
Joined: Fri Jan 16, 2009 2:40 am
Thanked: 32 times
Followed by:1 members

Re: Gmat prep - xy plane question

by Vemuri » Tue May 05, 2009 8:02 pm
IMO C. I felt both statements are required to determine the points.

y = x^2+x(a+b)+ab

Stmt1: a+b = -1.
Stmt2: ab = -6

Using both the statements, we get the equation as y=x^2-x-6 ==> y=(x-3)(x+2). So, the two points at which the graph intersect the x axis is at 3 & -2.

What is the OA?
Top
Senior | Next Rank: 100 Posts
Posts: 30
Joined: Sat Jan 31, 2009 8:29 pm
Location: new jersey
GMAT Score:640

by fercho81 » Wed May 06, 2009 9:11 am
Thanks for the answer Vemuri, unfortunately I don't have the OA, but you are right it should be C. Btw, very slick how you converted AB= -6 on statement 2, I didn't see that when I tried it.
Top
Post new topic Post Reply
• Page 1 of 1