Table of contents
- 0. Review of Algebra4h 16m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 6m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 19m
- 10. Combinatorics & Probability1h 45m
8. Conic Sections
Circles
Problem 41
Textbook Question
Identify and sketch the graph of each relation.
3x2+6x+3y2−12y=12
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1
Start by rewriting the given equation: \(3x^2 + 6x + 3y^2 - 12y = 12\). Notice that each term involving \(x\) and \(y\) can be grouped together.
Factor out the common factor of 3 from each term: \(3(x^2 + 2x) + 3(y^2 - 4y) = 12\).
Divide the entire equation by 3 to simplify: \(x^2 + 2x + y^2 - 4y = 4\).
Complete the square for the \(x\) terms: \(x^2 + 2x\). Add and subtract \(1\) (\((\frac{2}{2})^2\)) to complete the square: \((x + 1)^2 - 1\).
Complete the square for the \(y\) terms: \(y^2 - 4y\). Add and subtract \(4\) (\((\frac{-4}{2})^2\)) to complete the square: \((y - 2)^2 - 4\).
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