Question 204299
cube  root  of  (-64) = -4,,,,,(-4)^3 = -64
.
cube  root  of  (64) = 4,,,,,,,(4)^3 =64
.
sqrt  (-64) = sqrt(64)*sqrt(-1) = 8i,,,,,,,(8i)^2 = 64i^2 =-64
.
remember  sqrt(-1) =i,,,,,,i^2 =-1
.
sqrt(64) =8,,,,,,,,,,,,,,,,,,,,,,,,,,,,8^2 =64
.