Question 578155

(x^2+x+1)(x^2-x+1)    multiply each term through carefully, then combine like terms:


x^4 - x^3 + x^2
    + x^3 - x^2 + x
          + x^2 - x + 1
--------------------------

x^4      + x^2      + 1


x^4+x^2+1