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nah yang hasilnya 44 adalah 21+23= 44 , jadi 21X23 =483
44 = 2a + 4
44-4 = 2a
40/2 = a
20 = a
hasil kali
hasil = (a+1) x (a+3)
=(20+1) x (20+3)
= 21 x 23
= 483