Question

$x^{2n} + x^{n+1} + x^{n-1} +1 . scrieti sub forma de produs . cum as pute-o scrie ?$

Answer 1

$\it = x^{n+1}(x^{n-1} +1) +(x^{n-1} +1) = (x^{n-1} +1)(x^{n+1} +1)$