Answer:
Option C and D
Step-by-step explanation:
To find : After being rearranged and simplified, which of the following equations could be solved using the quadratic formula? Check all that apply.
Solution :
Quadratic equation is
with solution 
A. 
Simplifying the equation,


It is not a quadratic equation.
B. 
Simplifying the equation,


It is not a quadratic equation.
C. 
Simplifying the equation,


It is a quadratic equation where a=3, b=8 and c=-13.




D. 
Simplifying the equation,

It is a quadratic equation where a=3, b=1 and c=-30.




Therefore, option C and D are correct.