Five mark example problem II — task. Mathematics State Board, Class 10.

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Simplify

$\frac{1}{x^2 - 5x + 6} + \frac{1}{x^2 - 3x + 2} - \frac{1}{x^2 - 8x + 15}$

Answer:

The solution is

$\frac{i - i}{(i - i) (i - i) (i - i)}$ .

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