Question

Find the relation between x and y if its point (x,y) (1,2) (7,0) are collinear

Answer 1

Heya User,

--> Let :->

--------> A≡(x,y)
--------> B≡(1,2)
--------> C≡(7,0)

--------> ΔABC = 1/2 | x [ 2 - 0 ] + 1 [ 0 - y ] + 7 [ y - 2 ] | 
=====> 0 = | 2x - y + 7y - 14 |
=====> 0 = [ 2x + 6y - 14 ]
=====> 2x + 6y - 14 = 0; is the relation ...