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What is the value of p? (1) I p I = -2 (2) p^2 4 = 0 I got

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Intern
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Joined: 19 Nov 2004
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What is the value of p? (1) I p I = -2 (2) p^2 4 = 0 I got [#permalink] New post 19 Dec 2004, 18:24
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21. What is the value of p?

(1) – I p I = -2
(2) p^2 – 4 = 0

I got that (2) is insufficient but I do not know why (1) is insufficient
Manager
Manager
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Joined: 28 Nov 2004
Posts: 76
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Re: DS # 21: Value of p given abs. value & pefect square [#permalink] New post 19 Dec 2004, 20:41
cpcalanoc wrote:
21. What is the value of p?

(1) – I p I = -2
(2) p^2 – 4 = 0

I got that (2) is insufficient but I do not know why (1) is insufficient


(1) is insufficient since p could be 2 or -2.

(2) is insufficient.

Both combined are insufficient. So the answer is E.
Re: DS # 21: Value of p given abs. value & pefect square   [#permalink] 19 Dec 2004, 20:41
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What is the value of p? (1) I p I = -2 (2) p^2 4 = 0 I got

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