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U2^2 = U1 . U3
(x - 14)^2 = (x - 50) . (x - 5)
x^2 - 28x + 196 = x^2 - 5x - 50x + 250
x^2 - 28x + 196 = x^2 - 55x + 250
0 = x^2 - 55x + 250 - x^2 + 28x - 196
0 = -27x + 54
27x = 54
x = 54 : 27
x = 2
Suku kedua
= x - 14
= 2 - 14
= -12