misal kedua bilangan tersebut:
a - b = 12
a + b = 28
eliminasi
--------------- +
2a = 40
a = 40/2
a = 20 -----> subs ke a - b = 12
20 - b = 12
b = 20 - 12
b = 8
Maka:
ab
= 20 × 8
= 160
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misal kedua bilangan tersebut:
a - b = 12
a + b = 28
eliminasi
a - b = 12
a + b = 28
--------------- +
2a = 40
a = 40/2
a = 20 -----> subs ke a - b = 12
a - b = 12
20 - b = 12
b = 20 - 12
b = 8
Maka:
ab
= 20 × 8
= 160