Partial Fractions with Repeated Linear Factor

Resolve into partial fractions: $\frac{9}{( x - 1 ) ( x + 2 ) ^{2}}$

~8 minAnswer checked instantlypartial fractionsrepeated roots

H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. XXIII. Partial Fractions, Examples XXIII, No. 6

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Checked against the answer in H. S. Hall & S. R. Knight, Higher Algebra (1891).