Question

find the product of (x-1)(x+1)(x2+1)(x4+1)

Answer 1

$given \: expression \: is \\ (x-1)(x+1)(x^{2}+1)(x^{4}+1) \\ = ( {x}^{2}-1)( {x}^{2} + 1)( {x}^{4} + 1) \\ = ( {x}^{4} - 1)( {x}^{4} + 1) \\ = {x}^{8} - 1$