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2. 6a²+16a+8
3. 16a²-16a+4b²
semoga membantu :)
=9a²-9ab +9ab-9b²
=9a²-9b²
2.(6a+4) (a+2)
=6a²+12a+4a+8
=6a²+16a+8
3.(4a-2b)²
=(4a-2b)(4a-2b)
=16a²-8ab-8ab+4b²
16a²-16ab+4b²