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If x+(1)/(x)=a then what is x^(3)+x...

If `x+(1)/(x)=a` then what is
`x^(3)+x^(2)+(1)/(x^(3))+(1)/(x^(2))` equal to ?

A

`a^(3) +a^(2)`

B

`a^(3)+a^(2)-5a`

C

`a^(3)+a^(2)-3a-2`

D

`a^(3)+a^(2)-4a-2`

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