Question

The midpoint of AB is (3,-1) if the coordinates of A are (8,4) what are The coordinates of B?

Answer 1

B≡(-2,-6)

Explanation:

Let, B≡(x,y)

(8+x)/2 = 3

8+x=6

x=-2

and, (4+y)/2=-1

4+y=-2

y=-6

So, B≡(-2,-6)

Hope, this helps you.