Question

Show that the pointhis (1,2),(2,2),(3,2) are the collinear​

Answer 1

Answer:

$formula \\ |x1(y2 - y3) + x2(y3 - y1) + x3(y1 - y2)| \\ |1(2 - 2) + 2(2 - 2) + 3(2 - 2) | \\ |1(0) + 2(0) + 3(0)| \\ |0 + 0 + 0| = 0$