A certain circle can be represented by the following equation. x^2+y^2+18x+14y+105=0 What is the center of the circle? What is the radius of the circle?

See below.

Step-by-step explanation:

Recall the equation for a circle:

, where (h,k) is the center and r is the radius.

We need to turn the given equation into the above format. We do this by completing the square.

First, group them:

For the first section, complete the square for :

Do the same for the second:

All together:

The center is (-9,-7).

The radius is

just needed some points but try socratic

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step-by-step explanation: