Last visit was: 17 Nov 2024, 09:22 It is currently 17 Nov 2024, 09:22
Decision Tracker
My Rewards
New comers' posts
New posts
Unanswered

Close

GRE Prep 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 GRE 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
PREVIOUS TOPIC
NEXT TOPIC

If m > 0 and 3m2 + 12m – 15 = 0, then m =

Tags :
Find Similar Topics  About  Add a Tag

Show Tags
Hide Tags

User avatar
sandy
Retired Moderator
Joined: 07 Jun 2014
Posts: 4812
Own Kudos [?]: 11168 [0]
Given Kudos: 0
GRE 1: Q167 V156
WE:Business Development (Energy and Utilities)
Send PM
If m > 0 and 3m2 + 12m – 15 = 0, then m = [#permalink] New post   08 Apr 2018, 10:24
Expert Reply
00:00

Question Stats:

86% (00:28) correct 13% (01:04) wrong based on 23 sessions

Hide Show timer Statistics

If m > 0 and \(3m^2 + 12m - 15 = 0\), then m =

Drill 1
Question: 7
Page: 508


Show: :: OA
1
avatar
prakritipandey
Intern
Intern
Joined: 02 Aug 2017
Posts: 24
Own Kudos [?]: 17 [0]
Given Kudos: 0
Send PM
Re: If m > 0 and 3m2 + 12m – 15 = 0, then m = [#permalink] New post   09 Apr 2018, 21:06
1
3m2+12m-15=0
m2+4m-5=0
(m+5)(m-1)=0
m=-5,1
since m>0, m=1 ANS.
avatar
mohan514
Manager
Manager
Joined: 26 Jan 2018
Posts: 189
Own Kudos [?]: 167 [0]
Given Kudos: 0
GRE 1: Q165 V156
Send PM
Re: If m > 0 and 3m2 + 12m – 15 = 0, then m = [#permalink] New post   10 Apr 2018, 02:24
1
Factorization will give 2 possible values for m.

But as the question asks for only positive value, there is only one possible solution.

1
User avatar
sandy
Retired Moderator
Joined: 07 Jun 2014
Posts: 4812
Own Kudos [?]: 11168 [0]
Given Kudos: 0
GRE 1: Q167 V156
WE:Business Development (Energy and Utilities)
Send PM
Re: If m > 0 and 3m2 + 12m – 15 = 0, then m = [#permalink] New post   15 Apr 2018, 05:32
Expert Reply
Explanation

Factor the quadratic equation: \((3m - 3)(m + 5) = 0\).

Only the first factor gives a positive result: If \(3m - 3 = 0\), then \(m = 1\).

Alternately, you may notice that the equation is true if you ignore the variables, and making m = 1 would allow you to disregard them.
Prep Club for GRE Bot
gmatclubot
Re: If m > 0 and 3m2 + 12m – 15 = 0, then m = [#permalink]
15 Apr 2018, 05:32
Moderators:
adewale223
GRE Instructor
78 posts
bronaugust
GRE Forum Moderator
37 posts
BrushMyQuant
Moderator
1111 posts
VibhuAnurag
GRE Instructor
234 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Main navigation

Partners

GRE Resources

www.ets.org/gre | About | Terms and Conditions and Privacy Policy | Prep Club for GRE Rules | Contact