9 . L e t α + i β , α , β ∈ R b e a r o o t o f t h e e q u a t i o n x 3 + q x + r = 0 , q , r ∈ R , t h e n a r e a l c u b i c e q u a t i o n , i n d i p e n d e n t o f α a n d β , w h o s e o n e r o o t i s 2 α i s ( a ) x 3 + q x - r = 0 ( b ) x 3 + q x + r = 0 ( c ) x 3 - q x - r = 0 ( d ) N o n e o f t h e s e This question has not been answered yet! Answer Now
