Question

show that root P is a irrational number where p is a prime number

Answer 1

see in ur Math book.. there is root 2 given.. thus u can do it

Answer 2

if p is a prime no. then

p=1×p [as prime no. has factors 1 and itself]

so root p=root 1×p

as root 1xp is not a prime no.  

therefore it is root p is not a rational no.