Jawabanmu

Jawaban paling cerdas!
2014-09-10T15:06:07+07:00
1) 3a(2a-7b-c) = 6a²-21ab-3ac
2) 3x²(5x-2y+7) = 15x³-6x²y+21x²
         semoga membantu :)
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