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If x^2 + 3x + c = (x + a)(x + b) for all x, what is the

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Senior Manager
Joined: 10 Mar 2008
Posts: 326
If x^2 + 3x + c = (x + a)(x + b) for all x, what is the  [#permalink]

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03 Oct 2008, 10:45
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50% (00:01) correct 50% (03:13) wrong based on 11 sessions

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If x^2 + 3x + c = (x + a)(x + b) for all x, what is the value of c ?
(1) a = 1
(2) b = 2

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Intern
Joined: 29 Sep 2008
Posts: 46

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03 Oct 2008, 10:48
D

since a + b = 3 and ab = c, c an be a(3-a) OR b (3-b)

I and II independently give this answer.

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

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Re: DS &nbs [#permalink] 03 Oct 2008, 10:48
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