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Theorem 7.2.11: Partial Fraction Decomposition

Suppose p(x) is a polynomial of degree n such that p(x) = , where each qj is polynomial of degree j that is irreducible over R. If s(x) is another polynomial of degree less than n with no factors in common with p(x), then the rational function s(x) / p(x) can be written as a finite sum
where each rj is a polynomial of degree less than j.

Proof:

The proof is easiest when allowing complex numbers instead of reals and is not given.
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