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One of the roots of the equation
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03 Sep 2020, 10:46
03 Sep 2020, 10:46
Expert Reply
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Question Stats:
76% (00:41) correct
23% (01:09) wrong based on 67 sessions
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One of the roots of the equation \(x^2+5x-c=0\) is -2, and c is a constant
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
c |
6 |
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Re: One of the roots of the equation
[#permalink]
03 Sep 2020, 10:47
03 Sep 2020, 10:47
Expert Reply
Post A Detailed Correct Solution For The Above Questions And Get A Kudos.
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
For more theory and practice see our GRE - Math Book
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
For more theory and practice see our GRE - Math Book
Re: One of the roots of the equation
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04 Sep 2020, 05:20
04 Sep 2020, 05:20
1
If -2 is a root, then we can plug in -2 into the equation for x, and solve for c.
(-2)^2 + 5(-2) -c = 0
c = 4-10
c = -6
So the answer is B.
(-2)^2 + 5(-2) -c = 0
c = 4-10
c = -6
So the answer is B.
