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4- (-4) = 8
4x -4 = -16 ...a
misal a > 0
kemungknan :
(9, 1)(10, 2)(11, 3)(12, 4) .... (n , n-8)
kemungkinan terkecil hasil kali = 9 x 1 = 9
misal a = 0
kemungkinan :
(0, -8)
kemungkinan terkecil hasil kali = 0 x -8 = 0
misal a < 0
kemungkinan :
(-1, -9)(-2, -10)(-3, -11) ..... (n, n-8)
kemungkinan terkecil hasil kali = -1 x -9 = 9
misal b > 0
kemungkinan :
(9, 1)(10, 2) .....
kemungkinan terkecil = 9 x 1
misal b = 0
(8, 0)
kemungkinan terkecil = 8 x 0 = 0
misal b < 0
(7, -1)(6, -2)(5, -3)(4, -4)(3, -5)(2, -6)(1, -7)(0, -8) .....
kemungkinan terkecil :
7 x -1 = -7
6 x -2 = -12
5 x -3 = -15
4 x -4 = -16
3 x -5 = -15
......
sehingga untuk menghasilkan perkalian terkecil, a = 4 dan b = -4 dengan hasil kali -16