David Harold Meyer (March 27, 1930 - February 13, 1980), better known as David Janssen, was an Americanfilm and televisionactor who is best-known for his role as Dr. Richard Kimble in the television series The Fugitive (ABC,1963-1967). Also appeared in Richard Diamond,O'Hara, and Harry-O TV series and in a number of films.
... add a constant (i.e., in this case, a quantity that does not depend on x) to the expression to the left of "=", that will make it a perfect square trinomial of the form x2 ...