Question

47. If A(x,2), B(-3,-4) and C 7.-5) are collinear, then the value of X is
(a) - 63 (b) 63
(C) 60
(d) - 60
​

Answer 1

Answer:

1\2 [x(-4+5) -3(-5-2) +7(2+4) ] =0

》x -3×-7 +7×6 =0

》x+21+42=0

》x = -63