Question

Determinar o valor de M de modo que os pontos A(-2,7), B(m,-11) e C (1,-2), estejam alinhados.

Answer 1

A(-2, 7),
B(m,-11)
C (1,-2),
A(-2, 7),

Determinante = 0
22-2m+7 -7m+11-4=0
-9m +36 = 0
36 = 9m
m = 4 ✓