If `x=7+5sqrt2 ` then `(x^2+1/x^2)`=?

If x = 3 + sqrt7 , find x^2 + 1/x^2

If x=3+sqrt(7) , find x^2+(1)/x^(2)

If x=2sqrt2+sqrt7 then 1/2(x-1/x) is

If x=1/(2-sqrt3) find the value of x^3-2x^2-7x+5 .

If x= (sqrt5+1)/(sqrt5-1) and x = 1/y then find the value of (3x^(2) -7xy + 3y^(2))

If I=intsqrt((5-x)/(2+x))dx , then I equals a) sqrt(x+2)sqrt(5-x)+3sin^(-1)sqrt((x+2)/(3))+C b) sqrt(x+2)sqrt(5-x)+7sin^(-1)sqrt((x+2)/(7))+C c) sqrt(x+2)sqrt(5-x)+5sin^(-1)sqrt((x+2)/(5))+C d)None of these

The number of solutions of sqrt(3x^2 -7x -30) - sqrt(2 x^2 -7x-5) = x-5 is

If x=(7+5sqrt(2))^(1/3) -1/((7+5sqrt(2))^(1/3) , then the value of x^3+3x-14 is equal to 1 (b) 0 (c) 2 (d) 4

If x=(7+5sqrt(2))^(1/3)-1/((7+5sqrt(2))^(1/3)) , then the value of x^3+3x-14 is equal to 1 b. 0 c. 2 d. 4