Solve this:

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Let (?3+?5)^2 be rational number
?3^2+2*?3*?5+?5^2=p/q
3+2?15+5=p/q
8+2?15=p/q
?15=p-8/2-q.
here p,q,-8,2 are rational numbers but we know that ?15 is an irrational number.
Therefore (?3+?5)^2 is irrational
(?3+?5)^2 is not a rational number..
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Let the quetionmark be the root ...

I entered the underroot symbol but it converted to que mark i dont know how
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What are you looking for?