Consider the statement,
 Irrational numbers are closed under subtraction
 Is the statement true or false? If false, justify with a counterexample
 false; The numbers 2 and 7 are irrational, but V2 - cannot be simplified to an irrational number.
 true
 false; The number 2 is irrational, but 2 - 2 = 0 and is not irrational
 false; The numbers 10 and 6 are irrational, but
 /10
 V6 14 2 and 2 is not irrational