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b. bnyk suku 3
= 3p² + p² - 2p - p + 4 - 2
= 4p² + p + 2
jumlah suku nya ada 3
b. 2a + b + 3c + a - 3b - 2c
= 2a + a + b - 3b + 3c - 2c
= 3a - 2b + c
jumlah suku nya ada 3