Question

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Answer 1

Option 3 is right answer for your question.

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Answer 2

• x²+x+1

Step-by-step explanation:

(x-1) (x²+x+1)

x³-1³ is a difference of cube

a³-b³= (a-b) ( a²+ab+b²)

hence, a=x,b=1

x³-1= (x-1) ( x²+x+1)