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Sum of the solutions of

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Moderator
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Sum of the solutions of [#permalink] New post 08 Jan 2018, 14:12
Expert's post
00:00

Question Stats:

66% (00:50) correct 33% (00:59) wrong based on 21 sessions


Quantity A
Quantity B
Sum of the solutions of \(x^2 - 3x -10 = 0\)
Sum of the solutions of \(x^2 - 4x +3 = 0\)



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.

Kudo for the right answer and explanation.
[Reveal] Spoiler: OA

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Manager
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Kudos [?]: 41 [1] , given: 5

Re: Sum of the solutions of [#permalink] New post 10 Jan 2018, 01:14
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Lets factor the QA.
X^2 - 3x - 10 = 0
So the solution is (x+3)(x-5)
Or x = -3 OR + 5
The sum will give is 2.

Quantity B
(X-1)(X-3)
Solutions are 1 and 3. So the sum is 4.

Quantity B is bigger.
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Intern
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Kudos [?]: 3 [1] , given: 3

Re: Sum of the solutions of [#permalink] New post 16 Aug 2018, 19:22
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Shouldnt column A be (X+2)(X-5) = 0, hence x= -2 or +5
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Re: Sum of the solutions of [#permalink] New post 17 Aug 2018, 04:58
Expert's post
Yes,

the explanation above x=-3 is wrong. It is x=-2

But the OA is still B
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Re: Sum of the solutions of   [#permalink] 17 Aug 2018, 04:58
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