help - XP Math - Forums

 XP Math - Forums help

 09-16-2010 #1 megbones   Join Date: Sep 2010 Posts: 1 help Point M is between L and N on LN. Find LM and MN. LM=x^2, MN=x, and LN=12. i have no clue how to solve please help
 09-16-2010 #2 Mr. Hui     Join Date: Mar 2005 Posts: 10,609 If LM=x^2, MN=x, and LN=12, then x^2 + x = 12 Manipulative into quadratic form. x^2 + x - 12 = 0 Factor products of trinomal. (x + 4) (x - 3) = 0 Solve. x = -4 or x = 3 Eliminate negative length. x = 3 __________________ Do Math and you can do Anything!

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