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2. -p^2 -8p-15
3. -a^2 +2a+35
4. 2x^2 -5x-12
5. a^2 -2ab-15b^2
1. a kali 2a + a kali -4b + 3b kali 2a ditambah 3b kali -4b
= 2a² -4ab +6ab -12b²
=2a² + 2ab - 12b²
=2(a²+ab-6b²)
Sisanya caranya juga sama
2. -15 - 8p -p²
3. 35 +2a - a²
4. 2x² - 5x - 12
5. a² - 2ab -15b²