(Section 0.9: Simplifying Algebraic Expressions) 0.9.2 For example, we can divide the numerator and the denominator of xx2x+4()by xand obtain 1xx+4. We have canceleda pair of xfactors: 1xx+4=1+4WARNING 2:We cannotcancel a pair of xfactors in xx2+4, because xis notshown as a factor of the entiredenominator. Canceling and RestrictionsWhen canceling, if a factor is
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