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= (9p² - 12p + 4) - (p² - 2p + 1)
= 9p² - 12p + 4 - p² + 2p - 1
= 8p² - 10p + 3
difaktorkan :
1/8 x (8p - 4) x (8p - 6)
1/8 x 4(2p - 1) x 2(4p - 3)
jadi faktor-faktornya adalah :
(2p - 1)(4p - 3)