Answer
$300 = (x-6) \times (x-6 ) \times 3$
Work Step by Step
Length of the box $(l) = (x-6)$ in.
Width of the box $(w) =(x-6)$ in.
Height of the box $ (h) =3$ in.
Volume $(V) = 300$ cubic inches.
Volume of the box $V = l \times w \times h$
$300 = (x-6) \times (x-6 ) \times 3$
