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1/a + 3/ab
gunakan KPK dr kdua penyebut :
1.a / ab + 3.a / ab
= a/ab + 3a/ab
= a+3a / ab
= 4a/ab
= 4/b
2)
(12a²bc / 4ab²)²
= 12².a^2.2 .b².c² / 4².a².b^2.2
= 144a^4.b².c² / 16a².b^4
= 144/16 . a^4-2 . b^2-4 . c²
= 9a².b^-2 . c²
= 9a²c² / b²