Write the equation of the circle that satisfies the following conditions. Express the final equation in the form x ² + y ² + Dx + Ey + F = 0. Center at the origin and r = 3 A)x ² + y ² = 0 B)x ² - y ² - 9 = 0 C)x ² - y ² + 9 = 0 D)x ² + y ² + 9 = 0 E)x ² + y ² - 9 = 0

Question

Quizplus · Accepted Answer

The equation of a circle with center at the origin and radius $r$ is $x^2 + y^2 = r^2$. Substituting $r = 3$, we get $x^2 + y^2 = 9$, which rearranges to $x^2 + y^2 - 9 = 0$.

Write the Equation of the Circle That Satisfies the Following