Răspuns :
a multiplu de 2 ⇒ a = 2 k , k∈Z
b 3 ⇒ b = 3 m , m∈Z
a ·b = -12
2k · 3m = -12
6 ·k·m = -12
k·m = - 12:6
k · m = - 2
k -1 -2 1 2
------------------------------------------------------------------------------------------
m 2 1 -2 -1
a=-2 a=-4 a =2 a=4
b= 6 b= 3 b=-6 b=-3
b 3 ⇒ b = 3 m , m∈Z
a ·b = -12
2k · 3m = -12
6 ·k·m = -12
k·m = - 12:6
k · m = - 2
k -1 -2 1 2
------------------------------------------------------------------------------------------
m 2 1 -2 -1
a=-2 a=-4 a =2 a=4
b= 6 b= 3 b=-6 b=-3