Question

Simplify (2+√5) (2-√5)​

Answer 1

( 2 + √ 5 ) ( 2 - √ 5 )

2² - ( √ 5 ) ²

4 - ( √ 5 ) ²

4 - 5

- 1

Answer 2

Answer:

–1

Step-by-step explanation:

(2+√5) (2-√5)

= (2)^2 – (√5)^2... (a+b) (a-b)=a^2 - b^2

= 4 – 5

= –1

hope that helps u