Escitalopram is an oral drug that is used for treating depression and generalized anxiety disorder. Chemically, escitalopram is similar to citalopram . Both are in a class of drugs called selective serotonin reuptake inhibitors (SSRIs), a class that also includes fluoxetine , paroxetine and sertraline .
1 A circle is all of the points that are a fixed distance, known as the radius, from a given point, known as the center of the circle. 2  Explore the standard equation of a circle using the applet below (Go here for a larger version).
But circle equations are often given in the general format of ax2 + by2 + cx + dy + e = 0, When you are given this general form of equation and told to find the center and radius of a circle, you will have to complete the square to convert the equation to center-radius form.