I WILL GIVE BRANLIEST AND FIVE STAR AND HEART ANDD LOTS OF POINTS
(if answered correctly)

Answer:
54 units²
Step-by-step explanation:
The area of the entire square is 81 units^2 (9*(5+4))
The bottom-left triangle has an area of 6 units^2 ((4*3)/2)
The bottom-right triangle has an area of 10 units^2 ((5*4)/2)
81-(6+10)=65