How to do this question number 22 on Quadratic equations?:

22. If  α ,   β   and   γ  are the roots of the equation, x3-x-1=0, then  1 + α 1 - α + 1 + β 1 - β + 1 + γ 1 - γ  has the value.

a. 0       b. -1        c. -7       d. 1

 

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