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3 Unit A2 1: Pure Mathematics (A-level only)

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Question 193

A student writes

4x2−5x(x+1)(x−2)2≡Ax+1+B(x−2)2\displaystyle \frac{4x^2-5x}{(x+1)(x-2)^2}\equiv\frac{A}{x+1}+\frac{B}{(x-2)^2}(x+1)(x−2)24x2−5x​≡x+1A​+(x−2)2B​.

Explain the error in the proposed form of the partial fractions.

[1]
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3 Unit A2 1: Pure Mathematics (A-level only) Questions

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