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magical cook: Master | Next Rank: 500 Posts; Posts: 484; Joined: Sun Jul 30, 2006 7:01 pm; Thanked: 2 times; Followed by:1 members

by magical cook » Tue Aug 28, 2007 11:17 am

Can you pls help with your explanation? thanks!

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Source: Beat The GMAT — Problem Solving | Tue Aug 28, 2007 11:17 am

ratindasgupta: Senior | Next Rank: 100 Posts; Posts: 98; Joined: Mon Jun 11, 2007 10:32 pm; Location: Mumbai

by ratindasgupta » Tue Aug 28, 2007 1:11 pm

just plug in the values. u'll get E as the answer.

beny: Master | Next Rank: 500 Posts; Posts: 214; Joined: Fri Jul 20, 2007 1:35 am; Thanked: 3 times

by beny » Tue Aug 28, 2007 3:40 pm

Just set the equations equal to each other to get (x-5)*(x+1) = 0, so x = 5 or -1.

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