Question

plz answer only if you know​

Answer 1

√5-1 / √5+1

√5-1 /√5+1 × √5-1 / √5-1. Formula use >>>

1. (a-b)²

2. ( a²+b²)

(√5)² - (-1)² + 2 (√5 × -1) / (√5)² + (1)²

= 5 + 1 - √10 / 5 + 1

= 5 + 1 - √10 / 6

= 6 - √ 10 / 6

= - √10 ✓✓✓