Rasionalkan penyebut pecahan berikut ini A. 10/ 3+√7 =... B.√5-√7 / √5+√7

Bagian A
= 10/(3+√7) × (3-√7)/(3-√7)
= 10(3-√7) / (9 - 7)
= 10(3-√7) / 2
= 5(3 - √7)
= 15 - 5√7

Bagian B
= (√5-√7) / (√5+√7) × (√5-√7) / (√5-√7)
= (√5 - √7)² / (5 - 7)
= (5 - 2√35 + 7) / -2
= -2(√35 - 6) / -2
= √35 - 6

Semoga berguna +_+

A. 10/(3+akar7) x (3-akar7)/(3-akar7)

= (30 - 10akar7)/(9-7)
= (30-10akar7)/2
= (15 - 5 akar7)

B. (akar 5-akar7)/(akar5 + akar 7) x (akar5 - akar 7)/(akar5 - akar7)

= (5 - akar 35 - akar 35 + 7)/(5-7)
= (12 - 2 akar 35)/(-2)
= 6 - akar 35