Question

simplify (5+√5)n(5-√5)​

Answer 1

Answer:

20.

Step-by-step explanation:

Here,

The algebraic identity a^2 - b^2 = (a + b) (a - b) is used.

Therefore,

(5 + √5) (5 - √5) = (5^2 - √5^2)

= (25 - 5)

= 20.