Question

find the value of 'k'. If the co-ordinates of points A(2,-2) , B(-4,2) and C(-7,k) are collinear.​

Answer 1

Answer:

x1=2,x2=-4,x3=-7

y1=-2,y2=2,y3=k

Step-by-step explanation :

ar of triangle = 1/2(x1(y2-y3)+x2(y3-y1)+x3(y1-y2))

0=1/2(2(2-k)+(-4)(k+2)+(-7)(-2-2))

0=1/2(4-2k-4k-8+28)

0=1/2(-6k+24)

0=-3k+12

3k=12

k=12/3

k=4

Step-by-step explanation:

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