Target Test Prep 20% Off Flash Sale is on! Code: FLASH20

Redeem
Target Test Prep Flash Sale
Target Test Prep is 20% off right now!
Use code FLASH20

Available with Beat the GMAT members only code

MORE DETAILS
Magoosh
Magoosh
Study with Magoosh GMAT prep

Available with Beat the GMAT members only code

MORE DETAILS
Magoosh

(equation) Which of the following equations satisfies x=3-âˆ

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Elite Legendary Member
Posts: 3991
Joined: Fri Jul 24, 2015 2:28 am
Location: Las Vegas, USA
Thanked: 19 times
Followed by:37 members

(equation) Which of the following equations satisfies x=3-âˆ

by Max@Math Revolution » Thu Sep 22, 2016 4:21 pm
(equation) Which of the following equations satisfies x=3-√3?
A. x2-6x+6=0
B. x2+6x+6=0
C. x2-6x+11=0
D. x2+6x-11=0
E. x2-6x-4=0
Top
User avatar
Elite Legendary Member
Posts: 3991
Joined: Fri Jul 24, 2015 2:28 am
Location: Las Vegas, USA
Thanked: 19 times
Followed by:37 members

by Max@Math Revolution » Sat Sep 24, 2016 9:20 pm
==> x-3=-√3, and if you square that on both sides, you get x2-6x+9=3, x2-6x+6=0, and the answer is A.
Answer: A

- Forget conventional ways of solving math questions. In DS, Variable approach is the easiest and quickest way to find the answer without actually solving the problem. Remember equal number of variables and independent equations ensures a solution.
Top
Post new topic Post Reply
• Page 1 of 1