A circle is centered at (−4, −6) and has a radius of 3. Which of the following is the equation for this circle?
(x + 4)^2 + (y + 6)^2 = 3
(x − 4)^2 + (y − 6)^2 = 9
(x − 4)^2 + (y − 6)^2 = 3
(x + 4)^2 + (y + 6)^2 = 9
Stacey Warren - Expert brainly.com
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any help? stuck on this
Clarification: are those expression being squared?
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It would be D. (x-h)^2 + (y-k)^2 = r^2 is the equation of a circle.
Assuming (h,k) is the center.
(h,k) is the center. r is the radius. So in your first example,
We would rewrite that like this so that it fits the form I posted:
So now we see that h is -2, k is 3 and r is sqrt(10)
That means that the center of the circle is (-2,3) and the radius is sqrt(10)