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= -18a²b - 15ab² + 12b³
2. -2pq(3p² - 4pq - 7q²)
= -6p³q + 8p²q² + 14pq³
3. (8+5y)(9+5y)
= 72 + 40y + 45y + 25y²
= 25y² + 85y + 72
= -18a²b - 15ab² + 12b³
Nomor 2
= -6p³q + 8p²q² + 14pq³
Nomor 3
= 72 + 40y + 45y + 25y²
= 72 + 85y + 25y²
= 25y² + 85y + 72