Igive brainliest explain what is the square root of brainliest

Every positive real number has TWOsquare roots;  One is positive and one is negative. They are opposites of each other. 
 
10 is a square root of 100 because (10)(10) = 100, and  ̶ 10 is also a square root of 100 because  ( ̶ 10)( ̶ 10) = 100.

In general, “a” is a square root of “b” if a² = b, where “a” is a real number and b ≥ 0.
 
In conclusion:
  √(100) = 10 (the positive square root of 100)  and   
 ̶  √(100) =   ̶  (10) =  ̶ 10 (the negative square root of 100)