2.If `x^2+1/x^2 =9` then find the value of `x^4+1/x^4`

If x+1/x=9. find the value of x^4+1/(x^4)dot

If x=sqrt 2 +1 , find the value of x^4+1/x^4

If x-1/x=1/2 , then write the value of 4x^2+4/(x^2)

If x+1/x=4, find the values of x^4+1/(x^4)

If x-1/x=9, find the value of x^2+1/(x^2)

If 9^(x+2)=720+9^x , find the value of (4x)^(1/x)

If |[1, x, x^2], [x, x^2, 1], [x^2, 1, x]|=3, then find the value of |[x^3-1, 0, x-x^4], [0, x-x^4, x^3-1], [x-x^4, x^3-1, 0]|

If x+1/x=4, find the values of x^2+1/(x^2)

If x- (1)/ (x ) = 4 , find the value of : x+ (1)/(x)

If 3x+2y=12 and x y=6 , find the value of 9x^2+4y^2