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

Redeem

(2 -v5)x

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Master | Next Rank: 500 Posts
Posts: 392
Joined: Thu Jan 15, 2009 12:52 pm
Location: New Jersey
Thanked: 76 times

by truplayer256 » Thu Aug 20, 2009 2:04 pm
I'm guessing the v symbol means square root?

x=-1/2-sqrt(5)

Multiply the numerator and denominator by the conjugate of 2-sqrt(5), which is 2+sqrt(5). This will give you:

-2-sqrt(5)/-1 or 2+sqrt(5), which is option A.
Top
User avatar
Master | Next Rank: 500 Posts
Posts: 355
Joined: Thu Feb 19, 2009 12:42 pm
Thanked: 2 times
Followed by:1 members

by vineetbatra » Thu Aug 20, 2009 2:27 pm
truplayer256 wrote:I'm guessing the v symbol means square root?
Why do you say thay V symbol means Sq Root, I thought V is another variable like X.

Can you please elaborate.

Thanks,

Vineet
Top
Master | Next Rank: 500 Posts
Posts: 392
Joined: Thu Jan 15, 2009 12:52 pm
Location: New Jersey
Thanked: 76 times

by truplayer256 » Thu Aug 20, 2009 5:40 pm
Why do you say thay V symbol means Sq Root, I thought V is another variable like X.

Can you please elaborate.

Thanks,

Vineet
Well, V must've been a square root in this case because if you had treated it as a variable and had solved for x, you would've gotten:

(2 -v5)x = -1

x=-1/2-5v

As you can clearly see, this answer doesn't match any of the answer choices given. May I know the source of this question?

Also, if you look closely, the v looks similar to the beginning of a radical sign which gave me the thought that it was a square root.
Top
Post new topic Post Reply
• Page 1 of 1