Question

find the value of x which the point ( x,-1 ),(2,1),(4,5) are collinear​

Answer 1

Step-by-step explanation:

use area of triangle that

1/2 (x1)(y2-y3)(x2)(y3-y1)(x3)(y1-y2)=0 because they are collinear

x1=X,y1=-1,x2=2,y2=1,x3=4,y3=5

I think this may help u tq