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3+5=\sqrt{3+\sqrt{5}}=

Solution

Correct Option: 2

To solve this easily, we can go through the options and square the given options to see if they equate 3+53+\sqrt5

Look at the second option.

We know that (a+b)2=a2+b2+2ab(a+b)^2=a^2+b^2+2ab

Squaring the second option, we'll get:

52+12+2(52)(12)\frac{5}{2}+\frac{1}{2}+2(\sqrt{\frac{5}{2}})(\sqrt{\frac{1}{2}})

62+252=3+5\frac{6}{2}+\frac{2\sqrt5}{2}=3+\sqrt5

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