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If x = (1 + sqrt(3))/(2) and y = x^3 the...

If `x = (1 + sqrt(3))/(2)` and `y = x^3` then y satisfies which one of the following equations ?

A

`8y^2 - 20y - 1 = 0`

B

`8y^2 + 20y - 1 = 0`

C

`8y^2 + 20y + 1 = 0`

D

`8y^2 - 20y + 1 = 0`

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