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# Find a number x such that the sum of that number and its squ

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Manager
Joined: 12 Jan 2019
Posts: 89
Find a number x such that the sum of that number and its squ  [#permalink]

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12 Jan 2019, 11:49
00:00

Difficulty:

(N/A)

Question Stats:

86% (00:44) correct 14% (00:00) wrong based on 7 sessions

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Find a number x such that the sum of that number and its square is the least.
(a) –0.5
(b) 0.5
(c) –1.5
(d) 1.5
(e) 2

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Manager
Joined: 12 Jan 2019
Posts: 89
Re: Find a number x such that the sum of that number and its squ  [#permalink]

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12 Jan 2019, 11:55
Approach witg options

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Manager
Joined: 28 Aug 2018
Posts: 193
Re: Find a number x such that the sum of that number and its squ  [#permalink]

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12 Jan 2019, 13:06
IMO A

use the number mentioned in the option to get a firm answer

Potentially A and C are the only 2 answers

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Manager
Joined: 28 Jul 2016
Posts: 207
Location: India
Concentration: Finance, Human Resources
GPA: 3.97
Re: Find a number x such that the sum of that number and its squ  [#permalink]

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12 Jan 2019, 21:52
UdayPratapSingh99 wrote:
Find a number x such that the sum of that number and its square is the least.
(a) –0.5
(b) 0.5
(c) –1.5
(d) 1.5
(e) 2

Kudos for Kudos[b]

[b]Posted from my mobile device

$$x^2 +x$$ should be least.
Option A should fit in.
a) 0.25-0.5= -0.25
b) 0.25+0.5=0.75
c) 2.25-1.5=0.75
d) 2.25+1.5= 3.75
e)4+2 =6

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Re: Find a number x such that the sum of that number and its squ &nbs [#permalink] 12 Jan 2019, 21:52
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