Answer: A(stadium)=2x^2+(pi)*1/2x^2
(This is probably not correct... sorry :/ )
Step-by-step explanation:
A(stadium)=A(rectangle)+A(circle)
A(circle)=(pi)r^2
A(circle)=(pi)*1/2x^2
A(rectangle)=2x*x
A(rectangle)=2x^2
A(stadium)=2x^2+(pi)*1/2x^2
