Answers

2016-03-11T21:05:00+05:30
if they are collinear the area will be 0
 
take x1=5  y1 =2   x2=-3  y2=4  x3=x   y3=y

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

5(4-y)+(_3)(y-2)+x(2-4)=0

20-5y-3y+6-2x=0
-2x-8y+26=0
-2(x+4y-13)=0
     x+4y-13=0

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