Question

Which of the following is not an irrational number? 1. 5+√5. 2.(2+√5)3. 5√5. 4.(2+√5) (2-√5)​

Answer 1

Answer:

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Step-by-step explanation:

4.

$(2 + \sqrt{5} )(2 - \sqrt{5} )$

Answer 2

Answer:

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