Question

how we get Pythagoras triplets

Answer 1

if square of 2 no. is equal to a square of 1 no. then it can be called as Pythagorean Triplet .
e.g. 3,4,5

Answer 2

let the smallest even no. be 2m
find m from it
find m^2-1 n m^2+1
2m m^2-1 and m^2+1 are pythagorean triplet