Question

the square of an irrational number is alway rational

Answer 1

LET √2 BE AN IRRATIONAL NO.

SQUARING-√2=√2*√2=2
∴SQUARE OF ANY IRRATIONAL NO. IS IRRATIONAL.

Answer 2

THIS IS NOT ALWAYS TRUE

FOR EXAMPLE  {\sqrt[4]{x}}^2 = \sqrt{x} ; WHICH MAY NOT BE RATIONAL