Factor $LaTeX: \displaystyle - 20 x^{3} + 40 x^{2} - 8 x + 16$ .

Factoring out the GCF $LaTeX: \displaystyle -4$ from each term gives $LaTeX: \displaystyle -4(5 x^{3} - 10 x^{2} + 2 x - 4)$ . Grouping the first two terms and factoring out their GCF, $LaTeX: \displaystyle 5 x^{2}$ , gives $LaTeX: \displaystyle 5 x^{2}(x - 2)$ . Grouping the last two terms and factoring out their GCF, $LaTeX: \displaystyle 2$ , gives $LaTeX: \displaystyle 2(x - 2)$ . The polynomial now has a common binomial factor of $LaTeX: \displaystyle x - 2$ . This gives $LaTeX: \displaystyle -4[5 x^{2} \left(x - 2\right) +2 \cdot \left(x - 2\right)] = -4\left(x - 2\right) \left(5 x^{2} + 2\right)$ .