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Verified answer
27) p²- 9q² / p - 3q = (p + 3q)(p - 3q) / (p - 3q) = p + 3q28) (6pq x 2p² - 20p²q²) / 4p²q = (12p^3q - 20p²q²) / 4p²q = 4p²q(3p - 5q) / 4p²q
maka hasilnya 3p - 5q
#maaf jika salah semoga membantu