Answer
$128 = (x-4) \times (x-4) \times 2$
Work Step by Step
Length of the box $(l) = (x-4)$ in.
Width of the box $(w) =(x-4)$ in.
Height of the box $ (h) =2$ in.
Volume $(V) = 128$ cubic inches.
Volume of the box $V = l \times w \times h$
$128 = (x-4) \times (x-4 ) \times 2$
