The equation below describes a circle. What are the coordinates of the center of the circle?


(x + 5)2 + (y + 7)2 = 212

A(-5, 7)
B(5, -7)
C(-5, -7)
D(5, 7)

Verified Answer :

Answer:

(-5,-7)

Step-by-step explanation:

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The center of the given circle \((x+5)^{2} +(y+7)^{2} = 212\) is (-5, -7).

What is the general equation of a circle?

The general equation of the circle is

\((x-h)^{2} +(y-k)^{2} = r^{2}\).

Where,

(h, k) is the center of the circle.

and r is the radius of the circle.

According to the given question.

We have equation of the circle \((x+5)^{2} +(y+7)^{2} = 212\)

On comparing the above equation with the general equation of the circle

\((x-h)^{2} +(y-k)^{2} =r^{2}\)

we get h = -5 and k = -7

Therefore, the center of the given circle \((x+5)^{2} +(y+7)^{2} = 212\) is (-5, -7).

Thus, option c is correct.

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