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06-12-2018
Mathematics

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Write the standard equation of a circle with center (−4, 0) and radius 3.

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06-12-2018

The standard equation of a circle:

[tex](x-h)^2+(y-k)^2=r^2[/tex]

We have the center (-4, 0) → h = -4 and k = 0, and the radius r= 3. Substitute:

[tex](x-(-4))^2+(y-0)^2=3^2\\\\\boxed{(x+4)^2+y^2=9}[/tex]

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