Question

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

Answer 1

Answer:

The given points are A (−2, 1), B (a, b) and C (4, −1). Since the given points are collinear, the area of the triangle ABC is 0. ⇒ 1 2 [ x 1 ( y 2 - y 3 ) + x 2 ( y 3 - y 1 ) + x 3 ( y 1 - y 2 ) ] = 0. Here, x 1 = - 2 , y 1 = 1 , x 2 = a , y ...

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