Factorise and divide : (x -1) by (x +1) (2+1) – InterviewSolution

1.

Factorise and divide : (x -1) by (x +1) (2+1)

Answer»

(x^4 - 1) = (x^2 + 1)(x^2 - 1)= (x^2 + 1)(x - 1)(x + 1).

(x^4 - 1) / [ (x^2 + 1)(x + 1)]= [ (x^2 + 1)(x - 1)(x + 1) ] / [ (x^2 + 1)(x + 1)]= x - 1

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