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2) 3p - q - 2
3) a pangkat 2 + 14a
4) 2p pangkat 2 - 11pq + 15q pangkat 2
5) 27x pangkat 3 + 8y pangkat 3
6) 16p pangkat 2 - 40pq + 25q pangkat 2
= 4x + 4y
(note -2 + 2 = 0)
2. 2p + 2q -4 + p - 3q + 2 = 2p + p + 2q - 3q +2
= 3p - q +2
3. 6a² - 12a - 7a² + 2a = 6a² - 7a² - 12a + 2a
= a² - 10a
4. (p - 3q)(2p-4q) = 2p²- 4pq - 6pq + 12q²
= 2p²- 10pq + 12q²
5. (3x+2y)(9x² - 6xy + 4y²) = 27x pangkat 3 - 18x²y + 12xy²
6. (4p - 5q)² = (4p - 5q)(4p - 5q)
= 16p²- 20pq -20pq + 25q²
= 16p² - 40pq + 25q²