# Chapter 5 - Polynomials and Factoring - 5.5 Factoring Sums or Differences of Cubes - 5.5 Exercise Set - Page 338: 14

$(x+2)(x^2-2x+4)$

#### Work Step by Step

Using $a^3+b^3=(a+b)(a^2-ab+b^2)$ or the factoring of 2 cubes, the factored form of the given expression, $x^3+8 ,$ is \begin{array}{l} (x+2)[(x)^2-(x)(2)+(2)^2] \\\\= (x+2)(x^2-2x+4) .\end{array}

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