WEBQuadratic Formula: !=$*±√*!$-). #) Completing the Square Difference of Two Squares (DOTS) Natural Numbers: 1,2,3,4,5,… Whole Numbers: 0,1,2,3,4,5,… Integers: …,−3,−2,−1,0,1,2,3,… Rational Numbers: …,− 3 2,−1,− 1 2,0, 1 2,1, 3 2,… Real Numbers: …−2,−√2,0,! #,1,7,√3,… Irrational Numbers: …,−√2,7,√3,…