
 ↝ Form into  where a > 0 (Optional)
 where a > 0 (Optional)
 ↝ Multiply -1 for both sides.
 ↝ Multiply -1 for both sides.
↝ Then proceed with the Quadratic Formula.
 x = [-b ± (√b²-4ac)]/2a ↝ Quadratic Formula 

↝ As you can see that inside the square root, the numbers cannot be negative. Therefore, the solutions are imaginary. 
↝ Solution with Real Numbers  System ↝  There are no real solutions.
↝ Solution with Complex Number System ↝

Therefore, the answer for Complex Number System is (5±√7i)/2