My Math Forum Algebra 2 problem

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 October 6th, 2009, 07:55 AM #1 Newbie   Joined: Oct 2009 Posts: 1 Thanks: 0 Algebra 2 problem Find the sum of the solution xsquared + x=6 Please explain the process of solving for the sum of the solution. Thank you very much.
 October 6th, 2009, 08:31 AM #2 Global Moderator     Joined: Oct 2008 From: London, Ontario, Canada - The Forest City Posts: 7,958 Thanks: 1146 Math Focus: Elementary mathematics and beyond Re: Algebra 2 problem Hint: factorise x² + x - 6, then set the result equal to zero.
 October 6th, 2009, 09:33 AM #3 Senior Member   Joined: Mar 2007 Posts: 428 Thanks: 0 Re: Algebra 2 problem You also have your textbook and classroom notes, and Google [quadratic equations] for reference and many examples.
 October 6th, 2009, 02:26 PM #4 Global Moderator   Joined: Dec 2006 Posts: 20,926 Thanks: 2205 For any equation of the form ax² + bx + c = 0, where a ? 0, the sum of the roots is -b/a, which is -1 for your problem. Similarly, the product of the roots is c/a, but you weren't asked for that.
October 6th, 2009, 03:02 PM   #5
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Joined: Mar 2007

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Re:

Quote:
 Originally Posted by skipjack For any equation of the form ax² + bx + c = 0, where a ? 0, the sum of the roots is -b/a, which is -1 for your problem. Similarly, the product of the roots is c/a, but you weren't asked for that.
You may be right, since "sum" was mentioned, but it was poorly worded by Grove.

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