Bentuk sederhana dari 9/√2+√5

Question

Matematika Diposting : 2018-01-29 Diupdate : 2021-09-30 Razapus

Pertanyaan

Answer 1

Kelas 9 Matematika
Bab Akar dan Pangkat

9/(√2 + √5)
= 9/(√2 + √5) . (√2 - √5)/(√2 - √5)
= (9√2 - 9√5)/(√2² - √5²)
= (9√2 - 9√5)/(2 - 5)
= 3√5 - 3√2

Answer 2

9/(√2+√5)
= 9/(√2+√5) x (√2-√5)/(√2-√5)
= 9(√2-√5)/(2-2√5+2√5-5)
= 9(√2-√5)/(2-5)
= 9(√2-√5)/(-3)
= -3(√2-√5)
= 3√5 - 3√2