Need prelim math help! (1 Viewer)

[Joshmosh2]

There was a question in my textbook regarding locus and circles. The question states:
Find the exact length of AB where A and B are the centres of the circles x^2-6x+y^2=0 and x^2+4x+y^2+6y-3=0 respectively.
From what I assume, Im thinking this is supposed to be about the distance formula, once you work out the centres of each circle, but the answer doesn't entirely match. It's sqrt(34) units. Help please!

 

[strawberrye]

What are the centre points you have calculated? Perhaps look over your working to see whether you have correctly completed the square and applied the distance formula which is a square root formula. Your understanding and approach to the question sounds fine

 

[photastic]

Polish completing the square and you'll be fine.

 

[Joshmosh2]

Now I see what I got wrong. I'm embarrassed that I couldn't even see it. I guess that's what you get for staying up until 2.30am tying to solve a simple maths problem. Thanks a lot!