Question

If A(2,1) , B(8,3) , C(14,-1) are collinear then which of the following is true​

Answer 1

Answer:

=1/2(2(3-(-1))+8((-1)-1)+14(1-3))

=1/2(2(4)+8(2)+14(2))

=1/2(8+10+28)

=1/2(46)

=1×46/2

=46/2

=23