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# In the xy-plane, at how many points do line y = 6 and curve

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Manager
Joined: 04 Jan 2008
Posts: 116
In the xy-plane, at how many points do line y = 6 and curve  [#permalink]

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15 Sep 2008, 04:16
00:00

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(N/A)

Question Stats:

100% (02:15) correct 0% (00:00) wrong based on 1 sessions

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In the xy-plane, at how many points do line y = 6 and curve $$y=|x^2-x-6|$$ intersect?

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Director
Joined: 12 Jul 2008
Posts: 511
Schools: Wharton

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15 Sep 2008, 04:32
dancinggeometry wrote:
In the xy-plane, at how many points do line y = 6 and curve $$y=|x^2-x-6|$$ intersect?

0
1
2
3
4

E

6 = x^2 - x - 6
0 = x^2 - x - 12
0 = (x-4)(x+3)
x = 4 or -3

OR

-6 = x^2 - x - 6
0 = x^2 - x
0 = x*(x-1)
x = 0 or 1

--== 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!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Re: Zumit PS 019 &nbs [#permalink] 15 Sep 2008, 04:32
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# In the xy-plane, at how many points do line y = 6 and curve

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