Q8 of 157 Page 760

If the points A(x, 2), B(-3, -4) and C(7, -5) are collinear then the value of x is

Three points A, B, C are said to be collinear if,


Area of triangle formed by three points is zero


The formula of Area of Triangle of three points is given as follows:


⇒ A = 0


= 0


⇒ 1/2 × {[(x + 3) × 1] – [6× -10]} = 0


⇒ x + 3 + 60 = 0


⇒ x = -63


Therefore the value of x is -63.

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