Mathematics

Mathematics, 07.03.2021 18:30, benji2246

If A, B satisfied system: $\frac{2a}{a - 2b} - \frac{6b}{a + 2b} = 3 \\ \\ \frac{a}{a - 2b} + \frac{6b}{a + 2b} = - 1 \\$
what is
?

$\frac{ab}{{a}^{2} - 4 {b}^{2} }$

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