3/ akar a-2 akar b = jawab dgn benar

(3/√a) - (2√b)= 3/√a - 2√ab/√a
=(3-2√ab)/√a × √a/√a = (3-2a√b)/a
=3-2√b

Rasional

= 3 / (√a - 2√b)
= 3/(√a - 2√b) × (√a + 2√b)/(√a + 2√b)
= 3(√a + 2√b) / (a - 4b)
= (3√a + 6√b) / (a - 4b)

Semoga berguna +_+