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

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sandy

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Joined: 07 Jun 2014

Posts: 4805

GRE 1: Q167 V156

WE:Business Development (Energy and Utilities)

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

19 May 2018, 15:08

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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.

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mohan514

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Joined: 26 Jan 2018

Posts: 189

GRE 1: Q165 V156

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.

sandy

Retired Moderator

Joined: 07 Jun 2014

Posts: 4805

GRE 1: Q167 V156

WE:Business Development (Energy and Utilities)

Re: If (x - y) = and (x + y) = , what is the value of x2 - y2? [#permalink]

22 May 2018, 01:15

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mohan514 wrote:

Unless the value of fractions are known, we cannot answer this question. Please correct.

Fixed, Thanks
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gmatclubot

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