Question

Use quadratics---------------

Answer 1

A square's area is the square of the sides 

square area= side²
side=$\sqrt{96x^5}$
side=$\sqrt{2(2)(2)(2)(3)x^2(x)}$
side=$4x^2 \sqrt{3x}$

OR we can divide it 
    |_ $96x^5$
 x²|_ $96x^3$
 x⁴|_ $96x$
4x⁴|_ $3x$