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b × a = 18
6 - 3 = 3
6 × 3 = 18
Jadi, kedua bilangan tersebut adalah 3 dan 6.
a.b = 18 --> (b+3) b = 18
b²+3b-18 = 0
(b+6)(b-3) = 0
b= -6 atau b= 3, bilangan cacah b= 3
a - 3 = 3
a = 6