Last visit was: 22 Dec 2024, 10:26 It is currently 22 Dec 2024, 10:26

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
avatar
Senior Manager
Senior Manager
Joined: 20 May 2014
Posts: 285
Own Kudos [?]: 722 [4]
Given Kudos: 225
avatar
Intern
Intern
Joined: 25 Nov 2017
Posts: 2
Own Kudos [?]: 0 [0]
Given Kudos: 0
Send PM
avatar
Retired Moderator
Joined: 20 Apr 2016
Posts: 1307
Own Kudos [?]: 2280 [2]
Given Kudos: 251
WE:Engineering (Energy and Utilities)
Send PM
Verbal Expert
Joined: 18 Apr 2015
Posts: 30461
Own Kudos [?]: 36816 [3]
Given Kudos: 26100
Send PM
then which of the following are possible values of x? [#permalink]
Expert Reply
3
Bookmarks
If \(\frac{5x^2 + 65x + 60}{x^2 + 10x -24} = \frac{5x+5}{x-2}\) then which of the following are possible values of x?

Indicate all such values.

A. − 60

B. − 12

C. − 1

D. 1

E. 2

F. 5
avatar
Manager
Manager
Joined: 28 Nov 2017
Posts: 56
Own Kudos [?]: 82 [3]
Given Kudos: 0
Send PM
Re: then which of the following are possible values of x? [#permalink]
3
Quick Approach to these type of Questions Solve for the Denominator = 0 and REJECT those values for 'x' as the Denominator can't be 0.

In this question x not equal to 2 & -12 AS IT WILL MAKE THE Denominator 0.
avatar
Supreme Moderator
Joined: 01 Nov 2017
Posts: 371
Own Kudos [?]: 471 [1]
Given Kudos: 0
Send PM
Re: then which of the following are possible values of x? [#permalink]
1
Expert Reply
Carcass wrote:
If \(\frac{5x^2 + 65x + 60}{x^2 + 10x -24} = \frac{5x+5}{x-2}\) then which of the following are possible values of x?

Indicate all such values.

A. − 60

B. − 12

C. − 1

D. 1

E. 2

F. 5



\(\frac{5x^2 + 65x + 60}{x^2 + 10x -24} = \frac{5x+5}{x-2}.......(5x^2 + 65x + 60)*(x-2)=(x^2 + 10x -24)*(5x+5).........5(x^2+13x+12)*(x-2)=(x^2 + 10x -24)*5(x+1).........(x+12)(x+1)*(x-2)=(x + 12)(x -2)*(x+1)\)
so LHS=RHS therefore all values of x are possible except when the denominator becomes 0....
1) x-2=0 means x=2
2) \(x^2 + 10x -24=0........x^2+12x-2x-24=0....(x+12)(x-2)=0\) so x can be 2 or -12
combined x should not be 2 and -12 and rest of the values are possible.
Thus A, C, D and F
avatar
Manager
Manager
Joined: 08 Dec 2018
Posts: 94
Own Kudos [?]: 70 [0]
Given Kudos: 0
Send PM
Re: If (5x^2 + 65x + 60)/(x^2 +10x - 24) = (5x + 5)/(x - 2), the [#permalink]
1
pranab01 wrote:
Bunuel wrote:
If \(\frac{(5x^2 + 65x + 60)}{(x^2 +10x - 24)} = \frac{(5x + 5)}{(x - 2)}\), then which of the following are possible values of x?


A. −60
B. −12
C. −1
D. 1
E. 2
F. 5

Show: :: OA
A, C, D, and F




Here the equation can be written as-

\(\frac{5(x^2 + 13x + 12)}{(x^2 +10x - 24)} = \frac{5(x + 1)}{(x - 2)}\)

or \(\frac{(x^2 + 13x + 12)}{(x^2 +10x - 24)} = \frac{(x + 1)}{(x - 2)}\)

or \(\frac{(x + 12)(x+1)}{(x + 12)(x-2)} = \frac{(x + 1)}{(x - 2)}\)

or \(\frac{(x+1)}{(x-2)} = \frac{(x + 1)}{(x - 2)}\).

Now looking at the values we notice only when x=2, the equation is not possible, reset all are the possible values.




also, x=-12 gives undefined value, so this is also not possible
avatar
Retired Moderator
Joined: 20 Apr 2016
Posts: 1307
Own Kudos [?]: 2280 [0]
Given Kudos: 251
WE:Engineering (Energy and Utilities)
Send PM
Re: If (5x^2 + 65x + 60)/(x^2 +10x - 24) = (5x + 5)/(x - 2), the [#permalink]
jelal123 wrote:
also, x=-12 gives undefined value, so this is also not possible



Thanks. might be an oversight :shock:
Intern
Intern
Joined: 20 Jun 2021
Posts: 21
Own Kudos [?]: 16 [0]
Given Kudos: 152
WE:Manufacturing and Production (Manufacturing)
Send PM
Re: then which of the following are possible values of x? [#permalink]
Carcass , can you please explain the answer of the question. Thanks in advance.
Verbal Expert
Joined: 18 Apr 2015
Posts: 30461
Own Kudos [?]: 36816 [0]
Given Kudos: 26100
Send PM
Re: then which of the following are possible values of x? [#permalink]
Expert Reply
Ahasunhabib999 wrote:
Carcass , can you please explain the answer of the question. Thanks in advance.


Dear Sir the two explanations above (the short and the longest one ) are both perfect.

There is not a real shortcut
Senior Manager
Senior Manager
Joined: 23 Jan 2021
Posts: 294
Own Kudos [?]: 172 [0]
Given Kudos: 81
Concentration: , International Business
Send PM
Re: If (5x^2 + 65x + 60)/(x^2 +10x - 24) = (5x + 5)/(x - 2), the [#permalink]
Bunuel wrote:
If \(\frac{(5x^2 + 65x + 60)}{(x^2 +10x - 24)} = \frac{(5x + 5)}{(x - 2)}\), then which of the following are possible values of x?


A. −60
B. −12
C. −1
D. 1
E. 2
F. 5

Show: :: OA
A, C, D, and F


Kudos for correct solution.


This problem makes no sense for me :lol: :lol: :lol: :lol:
User avatar
GRE Prep Club Legend
GRE Prep Club Legend
Joined: 07 Jan 2021
Posts: 5088
Own Kudos [?]: 76 [0]
Given Kudos: 0
Send PM
Re: If (5x^2 + 65x + 60)/(x^2 +10x - 24) = (5x + 5)/(x - 2), the [#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: If (5x^2 + 65x + 60)/(x^2 +10x - 24) = (5x + 5)/(x - 2), the [#permalink]
Moderators:
GRE Instructor
88 posts
GRE Forum Moderator
37 posts
Moderator
1115 posts
GRE Instructor
234 posts

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