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#### Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here. # If x * = x^2 + 4, which of the following is equivalent to  Question banks Downloads My Bookmarks Reviews Important topics
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Moderator  Joined: 18 Apr 2015
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If x * = x^2 + 4, which of the following is equivalent to [#permalink]
Expert's post 00:00

Question Stats: 76% (00:24) correct 23% (00:19) wrong based on 17 sessions

If $$x* = x^2 + 4$$, which of the following is equivalent to $$2*$$ ?

A) (−2)*

B) 0*

C) 4*

D) 6*

E) 8*
[Reveal] Spoiler: OA

_________________ Director Joined: 03 Sep 2017
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Re: If x * = x^2 + 4, which of the following is equivalent to [#permalink]
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2* = 2^2+2 = 4. Thus, the only number to the * which leads to 4 is -2 since it is elevated to the 2 and it is exactly if we have 2. Answer A! Intern Joined: 22 Nov 2017
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Re: If x * = x^2 + 4, which of the following is equivalent to [#permalink]
2
KUDOS
Hi,

I would like to mention an error that u post above. ie u wrote 2*=2^2+2=4 .it is wrong.but agreeing with ur final answer.
2*=2^2+4=8 and the only number to the * which leads to 8 is -2.thus the answer is option A.
Intern Joined: 08 Dec 2017
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Re: If x * = x^2 + 4, which of the following is equivalent to [#permalink]
2*=2^2+4=8
Option A (-2)*= (-2)^2+4=8
So option A is the answer.
Intern Joined: 07 Oct 2017
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Re: If x * = x^2 + 4, which of the following is equivalent to [#permalink]
Thank you. Re: If x * = x^2 + 4, which of the following is equivalent to   [#permalink] 03 Feb 2018, 03:56
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# If x * = x^2 + 4, which of the following is equivalent to  Question banks Downloads My Bookmarks Reviews Important topics Powered by phpBB © phpBB Group Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.