Classify the equation as that of a circle, ellipse, hyperbola, or none of the above. 9x² + 9y² - 18x + 72y + 72 = 0 A) Circle B) Ellipse C) Hyperbola D) None of these

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Quizplus · Accepted Answer

The equation simplifies to $9x^2 + 9y^2 - 18x + 72y + 72 = 0$. By completing the square for both x and y terms, we can rewrite it in the standard form of a circle, indicating it represents a circle.

Classify the Equation as That of a Circle, Ellipse, Hyperbola