When a number is multiplied by itself, we say
 that the number is-
 When a
 number is multiplied by itself three times we say
 that the number is
 Often we need to know what number was
 squared in order to produce some value a. If
 such a number can be found, we call that
 number a
 of a. If we need to
 know what number was cubed, we call that
 number the
 The square root of a.
 does not exist in the realm of real numbers, but
 the cube root does.