Answer:
225 units squared
Explanation:
Lets find the distance (the side length of the square)
D=sqrt((x2-x1)^(2)+(y2-y1)^(2))
plug in the coordinates:
D=sqrt((-5-(-5))^(2)+(12-(-3))^(2))
D=sqrt(0^(2)+15^(2))
D=sqrt(15^(2))
D=15
Area of a square is side length squared
A=s^2
A=15^2
A=225 units squared