Question

The length of the segment between the points (2a, a-4) and (4, -1) is 2\sqrt{10} units. What is the product of all possible values for a?

Answer 1

using distance =sqrt {(x2-x1)^2+(y2-y1)^2}
where (x1,y1) and (x2,y2) are end points by using this find value of a then find product.