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Friday, October 16 Write in vertex form by completing the square. 1) y = x 2 + 8x + 3 2) y = x 2 + 10x + 11.

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Presentation on theme: "Friday, October 16 Write in vertex form by completing the square. 1) y = x 2 + 8x + 3 2) y = x 2 + 10x + 11."— Presentation transcript:

1 Friday, October 16 Write in vertex form by completing the square. 1) y = x 2 + 8x + 3 2) y = x 2 + 10x + 11

2 Circles

3 Circle - Set of all points in a plane that are equidistant from a given point called the center (h,k)

4 Example: Identify the center and radius and graph the circle. a) x 2 + y 2 = 16 Center: ____ Radius: ____

5 Example: Identify the center and radius and graph the circle. b) (x-3) 2 + (y-5) 2 = 36 Center: ____ Radius: ____

6 Example: Identify the center and radius. a) x 2 + y 2 + 6x – 7 = 0 Center: ____ Radius: ____

7 Example: Identify the center and radius. b) x 2 + 2x + y 2 + 4y – 11 = 0 Center: ____ Radius: ____

8 Example: Identify the center and radius. c) x 2 + y 2 – 6x – 12y + 36 = 0 Center: ____ Radius: ____

9 Example: Identify the center and radius. d) x 2 + y 2 + 2x + 6y = 26 Center: ____ Radius: ____


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