Patrick B. answered • 7d

Math and computer tutor/teacher

sqrt is the square root

the square root of a number squared is just that same number...

sqrt(5^2) = sqrt(25) = 5 <--- ? * ? = 25 so ?=5

sqrt(6^2) = sqrt(36) = 6 <--- x*x =36, so x=6

...

sqrt(10^2) = sqrt(100) = 10 <--- 10*10=100 , so sqrt(100)=10

IN GENERAL,

sqrt(N^2)= sqrt(N*N) = N

DO you understand?