Answers

2014-08-02T19:51:21+05:30
2014-08-02T19:54:15+05:30
(x-1)×(x+1)=x²-1
(x²-1)×(x²+1) = x^4-1
(x^4-1)×(x^4+1) = x^8-1
  solved using the identity:
(a+b)×(a-b)=a²-b²
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