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y 9y² 9y²
2. 2p - 3 - q + 4 = 2p + 4/9p - 3/6q - q
6q 9p
= 18p² + 4 - 3 - 6q²
9p 6q
3. 4m-5m + 3/3mn - 12/12n = -1m + 3/3mn - 12/12n
= -12m²n + 12 - 12m
12mn
yang nomer 2 masih bisa digabungi kaya nomer 1 & 3 kalo gak ya kya gitu gak papa... tp kalo salah saya minta maaf. mampuku segitu.