Question

Which of the following is not an irrational number.
a) (2-√3) 2
b) (√2+√3) 2
c) (√2-√3) (√2+√3)
d) 27 √7​

Answer 1

$( \sqrt{2} - \sqrt{3} )( \sqrt{2} + \sqrt{3} ) \\ is \: not \: an \: irrational \: number$