Teacher2Teacher |
Q&A #1530 |
From: Claudia
(for Teacher2Teacher Service)
Date: May 07, 1999 at 20:14:01
Subject: Re: Factoring out -1 in algebraic expressions
Marielouise had great suggestions! I always go back to basic arithmetic facts before I try to get my students to abstract to algebraic ones! Anyway, consider allowing the students to replace what I call "algebraic opposites" with -1, rather than factoring it out. If I see (2x - 1)/(1 - 2x) since BOTH signs are opposite for the denominator compared with the numerator their quotient is -1. -Claudia, for the Teacher2Teacher service
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