Area of triangle passing through points (5, -2), (2, 3) & (-2, -11) is
\(=\frac{1}{2}\begin{vmatrix}5 & -2 & 1\\2 & 3 & 1\\-2 & -11 & 1\end{vmatrix}\)
\(=\frac{1}{2}\)(5(3 + 11) + 2(2 + 2) + 1(-22 + 6))
\(=\frac{1}{2}\)(70 + 8 - 16)
\(=\frac{1}{2}\) \(\times\) 62
= 31
Hence, given points forms a triangle.
Therefore, they are not collinear.
