Question

if the point A (x,y),B (3,6).,c(-3,4) are collinear, then show that x-3y+15=0

Answer 1

Answer:

SINCE A (X,Y), B (3,6) AND (-3,4) are collinear

Therefore the condition must be satisied by the collinearity .

now

x1( y2-y3)+x2( y3-y1)+x3( y1- y2) = 0

x( 6-4)+3(4-y)-3(y-6) = 0

2x+12-3y-3y+18  = 0

2x-6y+30 = 0

2(x-3y+15 )= 0

x- 3y +15 = 0