Question

x = 2+ root 5 find x + 1/ x​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

$(2 + \sqrt{5}) + \frac{1}{2 + \sqrt{5} } \\ = \frac{( {2 + \sqrt{5)} }^{2} }{2 + \sqrt{5} } \\ = \frac{4 + 5 + 4 \sqrt{5} }{2 + \sqrt{5} } \\ = \frac{9 + \sqrt{5} }{2 + \sqrt{5} }$