Question

Write the standard form of the equation of the circle with the given center and radius.

14. center (-2,0) and r=3

Answer 1

center (-2,0) and $r=3$

The standard form of the equation of the circle with the given center

and radius is: $(x - a)^2 + (y - b)^2 = R^2$, where $a$ and $b$ are coordinates of the center and $R$ is radius.

We have:

$$\begin{array}{l} (x + 2)^2 + (y + 0)^2 = 3^2 \\ (x + 2)^2 + y^2 = 9 \\ \end{array}$$