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...From basic technical mathematics with calculus th edition by allyn j washington z x dx this example involves a repeated irreducible quadratic factor the partial fractions set up is bx c e multiplying both sides we obtain for get to b d and will expand equation equate coefcients of powers equating corresponding since can deduce as follows therefore wecanusethesubstitution u ln wecanusethetrigonometric substitution tan that wethenconclude gilles cazelais typeset lat on february...