Question

Descompuneti :
a ) E(x)= x^4 -1

Answer 1

$x^{4} -1$$=( x^{2} -1) (x^{2} +1)= (x-1)(x+1) ( x^{2} +1)$

$x^{6}-1 = ( x^{3}-1 ) ( x^{3}+1 ) = (x-1)( x^{2} +x+1) (x+1)( x^{2} -x+1)$