3x^2 - x - 2 = 0 x = 1 Is there another solution to this equation ie another number that can be x?
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Originally Posted by princess_anna57 3x^2 - x - 2 = 0 x = 1 Is there another solution to this equation ie another number that can be x? yes, princess, there is. in fact, quadratics always have two solutions (though there may be a repeated root, but whatever ) note that now for that to equal zero, we must have 3x + 2 = 0 or x - 1 = 0. those give you your two solutions
Last edited by Jhevon; Jul 11th 2008 at 01:56 PM. Reason: Ecirbaf reminded me of something
If you get a solution '1' and b^2-4*a*c (=(-1)^2-4*3*-1=25) isn't 0, it does exist another one, c/a( = -2/3).
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