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21 Jun 2022, 11:45
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Difficulty:
55%
(hard)
Question Stats:
62% (01:42) correct
38%
(01:48)
wrong
based on 301
sessions
History
Date
Time
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Not Attempted Yet
In the equation \(x^2+kx+1=0\), x is a variable and k is a constant. If the quadratic equation has two distinct real roots, which of the following could be true?
I. k = 0
II. k = −1
III. k = −3
A. I only
B. III only
C. I and II only
D. II and III only
E. I and III only
I. k = 0
II. k = −1
III. k = −3
A. I only
B. III only
C. I and II only
D. II and III only
E. I and III only
21 Jun 2022, 17:28
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Generally, the concept of Delta Δ is not approached in the GMAT studies, but for this question, in my opinion is the fastest way to “kill” this question.
Quadratic equation is given by ax^2 +bx + c = 0 and Δ = b^2 - 4ac.
Two distinct real roots demands Δ > 0.
Quadratic equation is given by ax^2 +bx + c = 0 and Δ = b^2 - 4ac.
Two distinct real roots demands Δ > 0.
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21 Jun 2025, 17:21
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