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)
