Explanation:
if I understand correctly, one side of the square is 2m⁴n.
so, the area of the square is
side² = (2m⁴n)² = 4m⁸n²
because
(2m⁴n)² = 2m⁴n × 2m⁴n
and that is 4m⁸n²
3.6m questions
4.6m answers