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x^2 - 7 = 0

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Senior Manager
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x^2 - 7 = 0 [#permalink]  24 Oct 2017, 01:03
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Question Stats:

74% (00:18) correct 24% (00:13) wrong based on 28 sessions
x^2 - 7 = 0

 Quantity A Quantity B x 3

A. The quantity in Column A is greater
B. The quantity in Column B is greater
C. The two quantities are equal
D. The relationship cannot be determined from the information given

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[Reveal] Spoiler: OA
Director
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Re: x^2 - 7 = 0 [#permalink]  25 Oct 2017, 07:55
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From the equation above we get $$x = \sqrt7 < 3$$.

Intern
Joined: 11 Jan 2018
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Kudos [?]: 37 [0], given: 7

Re: x^2 - 7 = 0 [#permalink]  09 Mar 2018, 12:49
From the given equation, we can get
$$x^2$$ = 7

So, either x = + $$\sqrt{7}$$ or x = - $$\sqrt{7}$$

In either case, x always less than 3

Thus, Quantity B Greater.
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Intern
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Re: x^2 - 7 = 0 [#permalink]  11 Mar 2018, 07:05
x^2 = 7
x = + \sqrt{7} or x = - \sqrt{7} In both cases it is below 3
Re: x^2 - 7 = 0   [#permalink] 11 Mar 2018, 07:05
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x^2 - 7 = 0

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