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To find: the center and radius of each circle and graph the circle.
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Answer to Problem 21RE
The center of the circle
Explanation of Solution
Given:
Calculation:
The standard equation of a circle with center
Express the given equation in the standard form.
Compare the equation with the standard form.
Therefore, the center of the circle
The center of the circle is at the point
Substitute 0for y in
Subtract 1 from both the sides.
Use the square root method.
The x -intercepts are
Substitute 0 for x in
Use the square root method.
Add 1 to both the sides.
The y-intercepts are -1 and 3.
Therefore the intercepts are
Conclusion:
Therefore the center of the circle
Chapter 1 Solutions
Precalculus
Additional Math Textbook Solutions
Precalculus (10th Edition)
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (4th Edition)
Glencoe Math Accelerated, Student Edition
Calculus & Its Applications (14th Edition)
Calculus and Its Applications (11th Edition)
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