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2) 2ab² / ab = 2b .......pembilang dan penyebut dibagi ab
3) 4 / (2a + 4b) = 4 / 2((a + 2b)
= 2 / (a + 2b)
4) (a + 5) / (4a + 20) = (a + 5) / 4(a + 5)
= 1/4
5) (m + 2) / (m² + 4) sudah sederhana
6) (m² - n²) / (m + n) = (m + n)(m - n) / (m + n)
= m - n
7) (a² + 4a + 3) / (a + 1) = (a + 3)(a + 1) / (a + 1)
= a + 3
8) soal tak terbaca (terpotong)
9) (2m - 2n) / (m² - n²) = 2 (m - n) / (m - n)(m + n)
= 2 / (m + n)