Please help I will BRAINLIST if right

Answer:
25[tex]x^{4}[/tex]y²
Step-by-step explanation:
The area (A) of a square is calculated as
A = s² ( s is the side length )
A = (5x²y)²
= 5 × 5 × x² × x² × y × y
= 25[tex]x^{4}[/tex]y²