find the value of p for which the points (-5,1) , (1,p) and (4,-2) are collinear
Answers
Answered by
3
EXPLANATION.
point are = (-5,1),(1,p),(4,-2) are collinear
TO FIND VALUE OF P.
Conditions of collinear
x1 ( y2 - y3) + x2 ( y3 - y1) + x3 ( y1 - y2) = 0
x1 = -5
x2 = 1
x3 = 4
y1 = 1
y2 = p
y3 = -2
-5[p - (-2) ] + 1 [ -2 - 1 ] + 4 [ 1 - p ] = 0
-5 [ p + 2] + 1 [ -3] + 4 - 4p = 0
-5p - 10 - 3 + 4 - 4p = 0
-9p - 9 = 0
-9p = 9
p = -1
Therefore value of p = -1
Similar questions