Solve the Equation $x ^ { 2 / 3 } - 2 x ^ { 1 / 3 } - 63 = 0$

Multiple Choice

Solve the equation $x ^ { 2 / 3 } - 2 x ^ { 1 / 3 } - 63 = 0$ . (Find all real and complex solutions.)

A) 729
B) $343,729$
C) $- 343 i , 729 i$
D) $7 i , 9 i$
E) $- 7,9$