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15 Jul 2022, 01:30
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C
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Difficulty:
45%
(medium)
Question Stats:
63% (01:39) correct
37%
(01:33)
wrong
based on 164
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In the equation \(x^2 + 2xy + y^2 = 144\), is x positive?
(1) y = 4
(2) x^2 = 64
(1) y = 4
(2) x^2 = 64
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
genericUser
Joined: 31 Jan 2022
Last visit: 22 Dec 2023
Posts: 111
Given Kudos: 35
Location: Italy
Schools: SDA Bocconi "24 (M)
GMAT 1: 670 Q49 V33
GMAT 2: 690 Q47 V37
GPA: 3.9
15 Jul 2022, 08:13
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(1) \(y = 4\)
\(x^2+8x-128=0\)
\((x+16)(x-8)=0\)
\(x=-16\)
\(x=+8\)
Insufficient.
(2) \(x^2 = 64\)
\(x=+8\)
\(x=-8\)
Insufficient.
(1)+(2)
\(x=8\)
Sufficient.
C
\(x^2+8x-128=0\)
\((x+16)(x-8)=0\)
\(x=-16\)
\(x=+8\)
Insufficient.
(2) \(x^2 = 64\)
\(x=+8\)
\(x=-8\)
Insufficient.
(1)+(2)
\(x=8\)
Sufficient.
C
20 Jul 2025, 17:41
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