Question

Find the value of 'a'if the point (a,3)(6,-2)and(-3,4)are the collinear

Answer 1

The line of the point (a, 3) and (6,-2) =6y-ay+5x-2a=0 also as the three point are collinear, the point (-3,4) lies on the line. So, a=3/2

Answer 2

Let (a,3) the midpoint of (6,-2) and (-3,4)
the midpoint of (6,-2) and (-3,4) = (3/2,1)
A/c....,
a = 3/2