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11 May 2022, 02:30
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C
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Difficulty:
15%
(low)
Question Stats:
80% (01:09) correct
20%
(01:16)
wrong
based on 76
sessions
History
Date
Time
Result
Not Attempted Yet
What is the value of x ?
(1) x^2 + x = 2
(2) x^2 + 2x – 3 = 0
(1) x^2 + x = 2
(2) x^2 + 2x – 3 = 0
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
18 May 2022, 00:12
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CASE-I
BY SOLVING QUAD EQ, WE GET X=-2 AND X=1. SO NO UNIQUE VALUE. HENCE AD CAN BE ELEMINATED
CASE-II, AGAIN SOLVING QUAD EQ, WE GET X=-3 AND X=1. AGAIN NOTSUFFICIENT SINCE NO UNIQUE VALUE IS THERE
BUT WHEN WE COMBINE BOTH CASES, WE GET COMMON X WHICH IS EQUAL TO 1.
SO MY ANSWERL WILL BE C
PLEASE CORRECT ME, IF I AM WRONG.
BY SOLVING QUAD EQ, WE GET X=-2 AND X=1. SO NO UNIQUE VALUE. HENCE AD CAN BE ELEMINATED
CASE-II, AGAIN SOLVING QUAD EQ, WE GET X=-3 AND X=1. AGAIN NOTSUFFICIENT SINCE NO UNIQUE VALUE IS THERE
BUT WHEN WE COMBINE BOTH CASES, WE GET COMMON X WHICH IS EQUAL TO 1.
SO MY ANSWERL WILL BE C
PLEASE CORRECT ME, IF I AM WRONG.
15 Jul 2022, 08:01
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Quadratic equation solved by sum and product of the roots.
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