Question

Center: (4, 0) Radius: 2 

          Center: (4, 0)
Radius: 2

Added by Amber S.

Elementary and Intermediate Algebra
Elementary and Intermediate Algebra
Alan S. Tussy, R. David Gustafson 5th Edition
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Center: (4, 0) Radius: 2
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Transcript

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00:01 To find the center of the circle and the radius, i'm going to get this equation in standard form.
00:08 So i'm going to move the 4x next to the x squared, leave some space.
00:14 I'm going to move the negative 6y next to the y squared and leave some space.
00:19 And i'm going to add one to the other side of the equation.
00:24 Now i'm going to complete the square.
00:27 Completing the square means i take half the middle term, square it, and add it.
00:31 Half of 4 is 2 and 2 squared is 4.
00:35 But whatever i do to one side of the equation, i have to 2 to the other to keep it balanced...
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