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).
In order to find the center and the radius of the circle, we first rewrite the given equation into the standard form as given above in the definition. Put all terms with x and x together and all terms with y and y together using brackets.(x - 4x) +(y - 6y) + 9 = 0. 2. The coordinate of C and the radius are used in the standard equation of the circle to obtain the equation: (x - 1) + (y - 2) = 2. (x - 1) + (y - 2) = 4. Go here and set h, k and r parameters into applet and plot the circle.