Question

anyone can solve this question​

Answer 1

$\textbf{\underline{\underline{ANSWER}}}$

12^2 - 6^2 = 144 - 64

= 80

80/2 = 40

similarly

13^2 - 7^2 = 169 - 49

= 120

120/2 = 60

8^2 - ?^2 = 60

64 - ?^2 = 60

?^2 = 4

? = 2

So your answer is 2.

Thanks