Subject:  Algebra

Partial fractions of 1/(x² − 5x + 6)

Decompose a rational function into a sum of simpler fractions.

Answer 1 / (x² − 5x + 6) = 1 / (x − 3) − 1 / (x − 2)

Solution

  1. Numerator 1
  2. Denominator x² − 5x + 6
  3. Discriminant of denominator Δ = 1
  4. Roots of denominator x₁ = 3, x₂ = 2
  5. Coefficients A = P(3)/(a·(x₁−x₂)) = 1, B = P(2)/(a·(x₂−x₁)) = -1
  6. Decomposition 1 / (x² − 5x + 6) = 1 / (x − 3) − 1 / (x − 2)

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