Find all real square roots of 64

8 and - 8

Step-by-step explanation:

The definition of a square root is 'a number which produces a specified quantity when multiplied by itself.' Though a negative number cannot have a square root or be a perfect square, it can be a square root.

8 is the only positive square root, but every number that has a square root, also has a second one, the negative version.

-8 is also the square root because it can be multiplied by itself to get 64 : D

Answer: only 8