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= - a² - 7a + 30 = (a - 3 ) (-a -10)
untuk no b maaf aku bingung nulisnya kayak gimana
c. (2p - 1) ( -2p -3)
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6x² + 12x + 6 ⇒ 6x² + 6x + 6x + 6
⇒ ( 6x² + 6x ) + ( 6x + 6 )
⇒ 6x ( x + 1 ) + 6 ( x + 1 )
⇒
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8p² - 10p - 3 ⇒ 8p² - 12p + 2p - 3
⇒ ( 8p² - 12p ) + ( 2p - 3 )
⇒ 4p ( 2p - 3 ) + p ( 2p - 3 )
⇒