Question

The midpoint of AB is M(-1,7). If the coordinates of A are (4,8), what are the

coordinates of B?

Answer 1

(-6,6)

Explanation:

Delta

Answer 2

B (-6,6)

Explanation:

For two points (a,b) and (c,d), the co-ordinate of the midpoint of the line joining the points is ((a+c)/2 , (b+d)/2)

Let, co-ordnate of B is (x,y)

So, (4+x)/2 = -1 ; (8+y)/2 = 7

=> x = -6 ; => y = 6

[If there's any mistake, please inform me]