Question

$a = \frac{2 - \sqrt{5} }{2 + \sqrt{5} } \: \: and \: \: b = \frac{2 + \sqrt{5} }{2 - \sqrt{5} } \: \: find \: \: {a}^{2} - {b}^{2}$
please answer,,,,
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Answer 1

Answer:

The answer of the following question is -321.9937888