Jawabanmu

2014-03-10T10:45:44+07:00
(a-b)(a)(a+b)
3a =12
a=4

(a-b)(a)(a+b)
(4-2)(4)(4+2)=x
2+4 +6 => Deret aritmetika
2+4+(6+2)
2+4+8==>deret geometri
(2)(4)(8)=64