Best to take this in two parts.
1, find the factors of 36:
1 and 36
2 and 18
3 and 12
4 and 9
6 and 6
2, Now, using those, add the factors and see which add up to 15... in this case, that would be 12 and 3!
Answer:
-4
-4×-4=16
Step-by-step explanation:
6^2 = 36
8^2 = 64
36+64=100 = 10^2
8^2=64
15^2=225
64+225=289
17^2 = 289
7^2=49
24^2=576
576+49=625
26^2 = 676
5^2=25
12^2=144
25+144=169
13^2=169
The third set does not make a right angled triangle.
The area of 
equals to the sum of areas of the triangles it consists of. So,
