One more time with Circles

Find the coordinates of the center and radius of the circle.

So I like to rewrite it

then I write it as the standard circle equation

So If I did this right I should have

and then my

Please I need someone to confirm to me I did this properly?

Side note is expanded to and I move the 16 over to the other side of the = sign in the equations.

Re: One more time with Circles

I messed this one up.... my math is wrong

Re: One more time with Circles

You are correct to rewrite as:

Now, we want to complete the square on *x* and *y*. Whatever we add to the left side, we must add to the right.

Now, write everything as squares:

From this, we know the center is (4,-5) and the radius is 6.