^ это означает квадрат

root корень

5^2+12^2=169

root 169 = 13 =c

4root2^2+7^2= 81

root 81 = 9 =c

0.7^2+2.4^2.4 = 6.25

root 6.25 = 2.5 = c

5^2+6^2= 61

root 61 =c

(5/13^2 )+ (12/13^2)= 25/169+144/169 =169/169=1

root 1 =1 =c