Question

please please answer my question

Answer 1

see full it is the way....
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Answer 2

(x^3 + 1) / (x + 1)
as (x^3 + 1) is equal to (x^2 - x +1 )*(x + 1)
=> (x^2 - x + 1)*(x + 1) / (x + 1)
=> x^2 - x + 1