Example 60

$\;\;\;(1 - 2u^{5})^2$

$=(A - B)^2 \text{, where } A = 1 \text{ and } B = 2u^{5} $

$=A^2 - 2AB + B^2$

$=(1)^2 - 2(1)(2u^{5}) + (2u^{5})^2 $

$=1 - 4u^{5} +4u^{10} $