Why don't you post the original question so we can see what you're being asked to work out? It looks like they've calculated the midpoint of a line joining two points and then set this equal to some other point, which allows them to solve for b and a. However, unless you tell us what this other point is supposed to be, no-one can give you a proper answer!
Why don't you post the original question so we can see what you're being asked to work out? It looks like they've calculated the midpoint of a line joining two points and then set this equal to some other point, which allows them to solve for b and a. However, unless you tell us what this other point is supposed to be, no-one can give you a proper answer!
The points V(−4,2a) and W(3b,−4) lie on the circle centre (b,2a) . The line VW is a diameter of the circle. Find the value of a and b.