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7.4 Partial Fractions

7.4 Partial Fractions. Get common den. Ex. 1. Mult. by the LCD. Choose zeros for x to find A and B. Let x = -2. Let x = 3. Ex. 2. Mult. by LCD. Let x = -1. 9 = C. 6 = A. Let x = 0. Pick x = 1. 31 = 6(4) + 2B + 9. -2 = 2B. B = -1. Ex. 3 Quadratic Functions that do not factor.

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7.4 Partial Fractions

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  1. 7.4 Partial Fractions Get common den.

  2. Ex. 1 Mult. by the LCD Choose zeros for x to find A and B. Let x = -2 Let x = 3

  3. Ex. 2 Mult. by LCD Let x = -1 9 = C 6 = A Let x = 0 Pick x = 1 31 = 6(4) + 2B + 9 -2 = 2B B = -1

  4. Ex. 3 Quadratic Functions that do not factor 3 = A + B if A = 1, B = 2 4 = C 4 = 4A A = 1

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