Answer:
The square root of 16 is (can be) both positive and negative, because -4^2 = 16, and 4^2 = 16.
Step-by-step explanation:
Since the both -4^2 and 4^2 equal 16, thinking of the sentence in converse allows us to say that the square root of 16 can both be positive (4) and negative (-4).
Hope this helps!