Question

find the value of a for which point P(a,2) is the midpoint of the line segment joining the points Q(-5,4) and R-1,0)

Answer 1

midpoint of a line=((x2+x1/2),(y2+y1))
                         =((-5+-1/2),(4+0/2))
                           =(-3,2)
ans:the coordinates of the midpoint=(-3,2)

Answer 2

coordinates of mid point, (x,y) =((x1+x2)/2),((y1 +y2)/2)
so coordinates of mid point ,x=(-5+(-1))/2 = -6/2 = -3
y= (4+0)/2 = 2
so coordinates of mid point =(-3,2)
Hence , a = -3