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Answer:
A = 10 units².
Explanation:
To solve this, we need to find the distance between the two points to derive the side-lengths of the square. Use the distance formula:

Plug in points into the formula to find the distance:

Simplify:



Find the area of the square using the formula A = s² where s = √10:
A = (√10)²
A = 10 units².