85-90 - Partial Fraction Decomposition Find the partial frac- tion decomposition of the rational expression. 3x + 1 8 85. x? - 2x - 15 86. x - 4x x + 6 - 2x + 4x - 8 2х — 4 87. 88. x(x – 1)? 2х - 1 89. x' + x 5x - 3x + 10 90. x* + x - 2

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