3+2sqrt(5)

What is the number of terms in the expansion of (3 + 2 sqrt(5) )^(18) - (3-2 sqrt(5) )^(18)

Prove that 3 + 2 sqrt(5) is an irrational number

Simplify: (i) (7+3\ sqrt(5))/(3+\ sqrt(5))-(7-3\ sqrt(5))/(3-\ sqrt(5)) (ii) 1/(2+sqrt(3)\ )+2/(sqrt(5)-\ sqrt(3))+1/(2-\ sqrt(5))

The value of log_(2)(root(3)(2+sqrt(5))+root(3)(2-sqrt(5))) is equal to

Prove that root(3)(2+sqrt(5))+root(3)(2-sqrt(5)) is a rational number.

Which one of the following is correct? The real number root3(2+sqrt(5))+root3(2-sqrt(5)) is :

" 3." (2+sqrt(5))(2+sqrt(5)) " is: "

1/(sqrt(3)+sqrt(2))-2/(sqrt(5)-sqrt(3))-3/(sqrt(2)-sqrt(5))

(2sqrt3 + sqrt5)(2sqrt3 - sqrt5)

The value of (3+sqrt(5))^2 (3-sqrt(5))^2 is: