Q&A #18119

Teachers' Lounge Discussion: "Bottoms up" as a method to factor trinomials

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From: Christine

To: Teacher2Teacher Public Discussion
Date: 2009120723:06:35
Subject: RE: Bottoms up as a method to factor trinomials

once you get the two factors of "a times " that add up to "b", you make two fractions, putting each factor over the "a" term. Then you simplify. What is the denominator then becomes the coefficient for the x term and the numerator becomes the constant in each binomial factor of the trinomial. Therefore, you are turning the bottom of the fraction "up" in setting up your factors. Hope this made some sense... it is easier to do visually!

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