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# If (x - y) = and (x + y) = , what is the value of x2 - y2?

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GRE Prep Club Legend
Joined: 07 Jun 2014
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GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
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If (x - y) = and (x + y) = , what is the value of x2 - y2? [#permalink]  19 May 2018, 15:08
Expert's post
00:00

Question Stats:

100% (00:01) correct 0% (00:00) wrong based on 4 sessions
If $$(x - y) = \sqrt{12}$$ and $$(x + y) =\sqrt{3}$$ , what is the value of $$x^2 - y^2$$?

(A) 3
(B) 6
(C) 9
(D) 36
(E) It cannot be determined from the information given.
[Reveal] Spoiler: OA

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Sandy
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Manager
Joined: 26 Jan 2018
Posts: 186
Followers: 0

Kudos [?]: 115 [0], given: 3

Re: If (x - y) = and (x + y) = , what is the value of x2 - y2? [#permalink]  21 May 2018, 21:27
Unless the value of fractions are known, we cannot answer this question. Please correct.
GRE Prep Club Legend
Joined: 07 Jun 2014
Posts: 4810
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 117

Kudos [?]: 1889 [0], given: 397

Re: If (x - y) = and (x + y) = , what is the value of x2 - y2? [#permalink]  22 May 2018, 01:15
Expert's post
mohan514 wrote:
Unless the value of fractions are known, we cannot answer this question. Please correct.

Fixed, Thanks
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Sandy
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Re: If (x - y) = and (x + y) = , what is the value of x2 - y2?   [#permalink] 22 May 2018, 01:15
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