Question

No 7 itu gimana ya ? Help donk mksh

Answer 1

Verified answer

Jawab

12/ (3 +√5) =

= 12 (3  - √5)/ (3+√5)(3 -√5)

= 12 ( 3 - √5)/ (9-5)

= 12/4 ( 3 - √5)

= 3 ( 3 - √ 5)

 = 9 - 3√5

Answer 2

12/(3+√5) =
dikalikan dengan sekawannya

= 12/(3+√5) x (3-√5)/(3-√5)
= 12 (3-√5) / (3+√5)(3-√5)
= 36 - 12√5 / 9 - 5
= 36 - 12√5 / 4
= 9 - 3 √5 (B)