Last visit was: 18 Nov 2025, 20:10 It is currently 18 Nov 2025, 20:10
Home
GMAT
Messages
Tests
Schools
Events
Rewards
Chat
My Profile
Close
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
Back to Forum
Create Topic
555-605 Level|   Algebra|   Arithmetic|      
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 18 Nov 2025
Posts: 105,355
Own Kudos:
778,087
 [2]
Given Kudos: 99,964
Products:
GMAT Club Tests Forum Quiz
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 105,355
Kudos: 778,087
 [2]
GMAT Club Around The World!!! When x = 0.2, what is the value of 3x^2- 01 Jan 2021, 01:00
Kudos
Add Kudos
2
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

25% (medium)

Question Stats:

74% (01:39) correct 26% (01:52) wrong based on 106 sessions

History

Date
Time
Result
Not Attempted Yet
When x = 0.2, what is the value of \(3x^2-1.3x-0.9\)?

A. -3.38
B. -2.30
C. -1.04
D. -0.76
E. -0.04



Happy New Year Canada, California, Idaho, Nevada, Oregon, and Washington!

Dec 31 Event: GMAT Club Around The World!
(38 new questions posted every hour time zone on Dec 31!)

ShowHide Answer
Official Answer
C
User avatar
zhanbo
User avatar
Joined: 27 Feb 2017
Last visit: 07 Jul 2024
Posts: 1,467
Own Kudos:
2,454
Given Kudos: 114
Location: United States (WA)
GMAT 1: 760 Q50 V42
GMAT 2: 760 Q50 V42
GRE 1: Q169 V168
GRE 2: Q170 V170
Expert
Expert reply
GMAT 2: 760 Q50 V42
GRE 1: Q169 V168
GRE 2: Q170 V170
Posts: 1,467
Kudos: 2,454
GMAT Club Around The World!!! When x = 0.2, what is the value of 3x^2- 01 Jan 2021, 01:16
Kudos
Add Kudos
Bookmarks
Bookmark this Post
My answer is (C).

By performing manual computation.
avatar
ananya3
avatar
Current Student
Joined: 05 Oct 2018
Last visit: 17 Dec 2022
Posts: 107
Own Kudos:
117
Given Kudos: 152
Location: India
Schools: Fuqua '24 Haas '24 ISB '23 Johnson '24 Kelley '24 Kenan-Flagler '24 McDonough '24 NUS Ross '24 Tepper '24 Tuck '24 Rotman '24 (A)
GMAT 1: 700 Q49 V36
GPA: 3.87
Schools: Fuqua '24 Haas '24 ISB '23 Johnson '24 Kelley '24 Kenan-Flagler '24 McDonough '24 NUS Ross '24 Tepper '24 Tuck '24 Rotman '24 (A)
GMAT 1: 700 Q49 V36
Posts: 107
Kudos: 117
GMAT Club Around The World!!! When x = 0.2, what is the value of 3x^2- 01 Jan 2021, 01:28
Kudos
Add Kudos
Bookmarks
Bookmark this Post
IMO B

\(x^2 = 0.04\)

\(3*x^2 - 1.3 x - 0.9\)
= 3*0.04 - 1.3 * 0.2 - 0.9
= 0.12 - 0.26 - 0.9
= -0.14 - 0.9
= -2.3
avatar
Deepakjhamb
avatar
Joined: 29 Mar 2020
Last visit: 15 Sep 2022
Posts: 218
Own Kudos:
135
Given Kudos: 14
Location: India
Concentration: General Management, Leadership
Schools: HBS '22 IIMA PGPX'22
GPA: 3.96
WE:Business Development (Telecommunications)
Schools: HBS '22 IIMA PGPX'22
Posts: 218
Kudos: 135
GMAT Club Around The World!!! When x = 0.2, what is the value of 3x^2- 01 Jan 2021, 05:13
Kudos
Add Kudos
Bookmarks
Bookmark this Post
When x = 0.2, what is the value of 3x2−1.3x−0.93x2−1.3x−0.9?

A. -3.38
B. -2.30
C. -1.04
D. -0.76
E. -0.04

answer is c ) -1.04

just substitute x =.2 in expression and we get the asnwer
avatar
BIDJI23
avatar
Joined: 26 Apr 2020
Last visit: 26 Feb 2022
Posts: 34
Own Kudos:
26
Given Kudos: 65
GMAT 1: 550 Q45 V22
GMAT 2: 620 Q48 V27
GMAT 2: 620 Q48 V27
Posts: 34
Kudos: 26
GMAT Club Around The World!!! When x = 0.2, what is the value of 3x^2- 01 Jan 2021, 05:21
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Let's push C
User avatar
rocky620
User avatar
Retired Moderator
Joined: 10 Nov 2018
Last visit: 11 May 2023
Posts: 501
Own Kudos:
607
Given Kudos: 229
Location: India
Concentration: General Management, Strategy
Schools: IIMA PGPX'22 IIMB EPGP'22 IIMC PGPEX'22 ISB'22
GMAT 1: 590 Q49 V22
WE:Other (Retail: E-commerce)
Schools: IIMA PGPX'22 IIMB EPGP'22 IIMC PGPEX'22 ISB'22
GMAT 1: 590 Q49 V22
Posts: 501
Kudos: 607
GMAT Club Around The World!!! When x = 0.2, what is the value of 3x^2- 01 Jan 2021, 08:57
Kudos
Add Kudos
Bookmarks
Bookmark this Post
3\(x^2\) = 3*.2*.2 = 0.12
1.3x = 1.3*.2 = .26

3\(x^2\) - 1.3x - 0.9 = 0.12 - 0.26 - 0.9 = -1.04

IMO Option C
avatar
TarunKumar1234
avatar
Joined: 14 Jul 2020
Last visit: 28 Feb 2024
Posts: 1,107
Own Kudos:
1,348
Given Kudos: 351
Location: India
Posts: 1,107
Kudos: 1,348
GMAT Club Around The World!!! When x = 0.2, what is the value of 3x^2- 02 Jan 2021, 06:13
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Given, 3x^2−1.3x−0.9 at x=0.2

= 3*0.04-0.26-0.9 = 0.12-0.26-0.90 = -1.04. So, It is C. :)
User avatar
Green2k1
User avatar
Joined: 06 Jun 2019
Last visit: 19 Aug 2024
Posts: 105
Own Kudos:
102
Given Kudos: 48
Location: India
Concentration: International Business, Technology
Posts: 105
Kudos: 102
GMAT Club Around The World!!! When x = 0.2, what is the value of 3x^2- 02 Jan 2021, 06:23
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Correct Answer C
When x = 0.2, what is the value of 3x2−1.3x−0.9?

3x^2−1.3x−0.9
=x(3*0.2 -1.3) -0.9
=0.2*-0.7 -0.9
=-1.04
avatar
manasi05
avatar
Joined: 23 Jul 2020
Last visit: 02 Nov 2021
Posts: 68
Own Kudos:
33
Given Kudos: 55
Location: India
Posts: 68
Kudos: 33
GMAT Club Around The World!!! When x = 0.2, what is the value of 3x^2- 04 Jan 2021, 10:19
Kudos
Add Kudos
Bookmarks
Bookmark this Post
To make the calculation easy I will convert the decimal form into fraction form
x = 0.2 = 2/10
3x^2 - 1.3x - 0.9
3x^2 - 13x/10 - 9/10
Substituting the value of x in the equation
3* (2/10)^2 - (13/10)*(2/10) - 9/10
= 3*(4/100) - 26/100 - 9/10
= 12/100 - 26/100 - 9/10
= -104/100
= -1.04
The correct answer will be C
Moderators:
Bunuel
Math Expert
105355 posts
Krunaal
Tuck School Moderator
805 posts