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a = 25 - b
a. b = 136
a = 136/b
25 - b = 136/b
25b - b² = 136
0 = b² - 25b + 136
0 = (b - 17) (b - 8)
b = 17 atau b = 8
a = 25-17 a = 25 - 8
a = 8 a = 17
selisih = 17 - 8 = 11 atau 8 - 17 = -11