Anxiety Disorder Statistics. Anxiety Disorders affect 18.1 percent of adults in the United States (approximately 40 million adults between the ages of 18 to 54).
Perfect square. Perfect square is an element of algebraic structure which is equal to the square of another element. Square number, a perfect square integer.
Before discussing the technique of completing the square, a preliminary definition is needed: DEFINITION perfect square trinomial. A perfect square trinomial is a trinomial that can be written in the form [beautiful math coming... please be patient] $\,(x+k)^2\,$.