Question

(x+1)(x-1)(x la a doua +1)(x la a patra+1)
URGENT!

Answer 1

(x²-1)(x²+1)(x la a patra +1)
(x la a patra -1)(xla a patra +1)⇒X la a opta -1

Answer 2

  ($x^{2}$ -x + x - 1) ( $x^{6}$ + $x^{2}$ + $x^{4}$ +1) =
   = ($x^{2}$ - 1) (tex] x^{6} [/tex] + $x^{2}$ + $x^{4}$ +1) =
= ( $x^{8}$ + $x^{4}$ + $x^{6}$ + $x^{2}$ - $x^{6}$-$x^{2}$-$x^{4}$ - 1)=
= $x^{8}$ - 1