Jawabanmu

2014-03-30T16:05:49+07:00
A + a + b + a + 2b = 18
3a + 3b = 18
a + b = 6
a = 6 - b

a x (a + b) x (a + 2b) = 192
(6 - b) x 6 x (6 + b) = 192
36 - b² = 32
b² = 4
b = √4 = 2
a = 6 - b = 6 - 2 = 4

bilangan tersebut : a , a+b , a+2b = 4, 6, 8
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