Centre is at the middle or the midpoint of the diameter.
And the formula of midpoint is

For the given question, x1=-4, y1=2, x2=2, y2=-8
So we will get

And that's the required centre .
Answer:
x=-12
Step-by-step explanation:
3x+5=2x-7
3x=2x-12
x=-12
The answer is 52 hopefully this help