Question

Rasionalkan penyebut dari
3/√3 + 4 =

√3 -√5 / √5 + √3 =

Answer 1

3/(√3 + 4) = 3(√3 - 4)/(3 - 16)
= (- 3/13)(√3 - 4)

(√3 - √5)/(√5 + √3) = (√3 - √5)(√5 - √3) / (5 - 3)
= (1/2)(√15 - 3 - 5 + √15)
= (1/2)(2√15 - 8)
= √15 - 4