A fourth degree equation in x with rational coefficients has two pairs of equal roots. If one of the roots is 3-√5 , then what can be the possible equation?:

1) x4 – 4x3 + 36x2 – 48x + 16 = 0
2) x4 – 12x3 + 44x2 – 48x + 16 = 0
3) x4 – 8x3 + 36x2 – 36x + 16 = 0
4) Can’t be determined