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 January 27th, 2013, 05:09 AM #1 Newbie   Joined: Jan 2013 Posts: 1 Thanks: 0 solving an easy equation problem >_< Hello I have no idea what I'm doing wrong in this simple equation: Code: 0 = -3^2 - 4 * 2 * x 3^2 = -4 * 2 * x 9 = -4 * 2 * x 9 / (-4 * 2) = x x = -1.125 x should be 1.125 but I can't figure out what I did wrong. Any help would be appreciated, thanks!
 January 27th, 2013, 05:20 AM #2 Math Team     Joined: Mar 2012 From: India, West Bengal Posts: 3,871 Thanks: 86 Math Focus: Number Theory I don't see anything wrong in your derivation! But this is not a number theory problem, you posted it in the wrong section.
 January 27th, 2013, 06:58 AM #3 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 12,751 Thanks: 860 Re: solving an easy equation problem >_< 0 = -3^2 - 4 * 2 * x ; then x = -1.125 ; -3^2 = -9 0 = (-3)^2 - 4 * 2 * x ; then x = 1.125 ; (-3)^2 = 9
January 28th, 2013, 01:58 PM   #4
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Re: solving an easy equation problem >_<

Quote:
 Originally Posted by DannyChu 0 = -3^2 - 4 * 2 * x 3^2 = -4 * 2 * x
-3^2 = -9 since exponentiation has precedence over subtraction.

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