## Elementary Algebra

$(1-2x)(1+2x+4x^2)$
Using $a^3-b^3=(a-b)(a^2+ab+b^2)$ or the factoring of the difference of $2$ cubes, the factored form of the given expression, $1-8x^3 ,$ is \begin{array}{l}\require{cancel} (1-2x)[(1)^2+1(2x)+(2x)^2] \\\\= (1-2x)(1+2x+4x^2) .\end{array}