Question

determine o valor de X para que os pontos a (4,6),b( X,-8) e c( X,-2) sejam colineares.

Answer 1

|4 6 1 | 4 6 |
|x -8 1 | x -8| =0
|x -2 1 | x -2|

-32+6x-2x+8x+8-6x=0
6x=-8+32
6x=24
x=24/6
x=4