(Section 0.9: Simplifying Algebraic Expressions) 0.9.3 PART C: CANCELING OPPOSITE FACTORSa±b()and b±aare opposites. Canceling Opposite FactorsThe quotient of nonzero, oppositefactors is ±1. Example 1 (Canceling Opposite Factors)Simplify 9±x2x±3. § Solution Method 19±x2x±3=3+x3±xx±3WARNING 3:It is incorrect to factor 9±x2as x+3x±3, which is the factorization of x2±9.3±xand x±3are opposites
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