Prove that 1 2 root 5 is an irrational number July 8, 2019 16 32 64 128 Prove that 1 upon 2 minus root 5 is an irrational number Prove that 1 upon 3 minus 2 root 5 is an irrational number Prove that 1 by 3 minus 2 root 5 is an irrational number Prove that root 2 is irrational Square root of 2 is irrational proof by contradiction