The shape is closed because the sides touch.
Answer:
The shaded area is 
Step-by-step explanation:
we know that
The shaded area is equal to the area of the large square minus the area of the two smaller squares
so

---> expression that represent the shaded area
Calculate the shaded area
Remember that

substitute

Answer:
X
Step-by-step explanation:
2x-x=x
5-5=0
Answer:
10000.
Step-by-step explanation:
i think.. i may be wrong.
-6 x -7 because they multiply and add