Question

(Q). The value of p, for which the points A(3, 1), B(5,p) and C(7,-5) are collinear, is
(d) - 1
(a) -2
(b) 2
(C) -1
(d) 1

(explain your answer)​

Answer 1

Answer:

-2

Step-by-step explanation:

ab^2=bc^2

(3-5)^2+(1-p)^2=(7-5)^2+(p-[-5])^2

4+1+p^2-2p=4+p^2+25+10p

5-2p=29+10p

-24=12p

p=-2

Answer 2

Step-by-step explanation:

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