Last visit was: 10 Nov 2024, 04:15 It is currently 10 Nov 2024, 04:15

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.

Close

Request Expert Reply

Confirm Cancel
Verbal Expert
Joined: 18 Apr 2015
Posts: 29924
Own Kudos [?]: 36165 [2]
Given Kudos: 25899
Send PM
Retired Moderator
Joined: 02 Dec 2020
Posts: 1833
Own Kudos [?]: 2146 [2]
Given Kudos: 140
GRE 1: Q168 V157

GRE 2: Q167 V161
Send PM
Retired Moderator
Joined: 16 Apr 2020
Status:Founder & Quant Trainer
Affiliations: Prepster Education
Posts: 1546
Own Kudos [?]: 3216 [1]
Given Kudos: 172
Location: India
WE:Education (Education)
Send PM
avatar
Intern
Intern
Joined: 06 Dec 2020
Posts: 30
Own Kudos [?]: 9 [2]
Given Kudos: 1
Send PM
Re: (x^2+9)(x+9)(x-5)=0 [#permalink]
1
1
Bookmarks
The basic idea in this questions is that A x B =0 only when A=0 or B=0 or both=0

Similarly, in the given question, one of the terms has to be 0,
thus we have a total of 3 possible equations.

\(x^2+9=0\) implying that x is an imaginary number since square of any real number is always positive
\(x+9=0\) implying that x can be -9
\(x-5=0\) implying that x can be 5

Both the real possible values of x are lesser than part B of the question, hence Option B is correct because 7 will always be greater than -9 or 5
User avatar
GRE Prep Club Legend
GRE Prep Club Legend
Joined: 07 Jan 2021
Posts: 5005
Own Kudos [?]: 74 [0]
Given Kudos: 0
Send PM
Re: (x^2+9)(x+9)(x-5)=0 [#permalink]
Hello from the GRE Prep Club BumpBot!

Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Prep Club for GRE Bot
Re: (x^2+9)(x+9)(x-5)=0 [#permalink]
Moderators:
GRE Instructor
78 posts
GRE Forum Moderator
37 posts
Moderator
1111 posts
GRE Instructor
234 posts

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