Question

If x = 4+root 5 , find the value of x^3-1/x^3​

Answer 1

Answer:

given X=4+√5

then x^3-1/x^3

(4+√5)^3-1/(4+√5)^3

(a+b)^3 =a^3+b^3+3ab(a+b)

Explanation:

expand that u will get answer

hope this may help you