Answer :

[tex]x^3+8=x^3+2^3\\\\use\ a^3+b^3=(a+b)(a^2-ab+b^2)\\\\=(x+2)(x^2-(x)(2)+2^2)\\\\\huge\boxed{=(x+2)(x^2-2x+4)}[/tex]
(X+2)^3
Because X^3 is X^3
And 2^3 is 8