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

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

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New post 12 Jan 2019, 12:49
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A
B
C
D
E

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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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Senior Manager
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Re: Find a number x such that the sum of that number and its squ  [#permalink]

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New post 12 Jan 2019, 12:55
Approach witg options

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Re: Find a number x such that the sum of that number and its squ  [#permalink]

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New post 12 Jan 2019, 14:06
IMO A

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

Potentially A and C are the only 2 answers
Where A leads the answer

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Re: Find a number x such that the sum of that number and its squ  [#permalink]

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New post 12 Jan 2019, 22:52
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

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[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

straight answer A
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Re: Find a number x such that the sum of that number and its squ   [#permalink] 12 Jan 2019, 22:52
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Find a number x such that the sum of that number and its squ

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