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Polynomials

Question

Which of the following numbers is an irrational number?
$square root of 16 minus 4 end root$
$left parenthesis 3 minus square root of 3 right parenthesis left parenthesis 3 plus square root of 3 right parenthesis$
$square root of 5 plus 3$
$negative square root of 25$

Solution

square root of 5 plus 3