Rational Expressions

Example: Evaluate x2 ( 3 when x = -9. x + 9. Recall that-a = a = _ a when b(0. b -b b. This is also true of polynomials. My suggestion is to simply pull any negative signs out and consider the entire expression as either a positive or negative expression. Example: - ( x + 3 ) = _ x + 3 ................
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