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A function of the form p(x)q(x)\frac{p(x)}{q(x)}q(x)p(x) where p(x)p(x)p(x) and q(x)q(x)q(x) are polynomials
Use polynomial factorization, then cancel common factors
Numerator degree ≥\geq≥ denominator degree
Perform division first
Ax+a+Bx+b\frac{A}{x+a} + \frac{B}{x+b}x+aA+x+bB
Bx−a+C(x−a)2\frac{B}{x-a} + \frac{C}{(x-a)^2}x−aB+(x−a)2C
Multiply both sides by common denominator
Use tactical substitution (values that make terms zero)
Same/common denominator
≡\equiv≡ (identity symbol)
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