2 under root 5 is a rational or irrational number July 8, 2019 16 32 64 128 2 root 5 is a rational or irrational number 3 2 root 5 is a rational or irrational number √2 is irrational proof class 10 √ 5 Square root of 2 is irrational proof by contradiction Prove that root 2 is irrational