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

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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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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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Joined: 29 Sep 2008
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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.
Re: DS   [#permalink] 03 Oct 2008, 10:48
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