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r = dan ...
r =
sehingga :
(x + 1)(x + 16) = 100
x² + 17x + 16 = 100
x² + 17x + 16 - 100 = 0
x² + 17x - 84 = 0
(x - 4)(x + 21) = 0
x - 4 = 0 atau x + 21 = 0
x = 4 atau x = - 21
u2² = u1 . u3
100 = (x+1)(x+16)
100 = x² + 17x + 16
x² + 17x - 84 = 0
(x+21)(x-4) = 0
x = -21
x = 4