B is your answer because 20 - -10 is 10 brainliest please
        
             
        
        
        
Answer:
C & D
Step-by-step explanation:
x² + 3x - 3 = 0
a = co efficient of  x² = 1
b=  co efficient of x = 3
c = constant = -3
roots = (-b ±  )/2a
)/2a
     = (-3±![\sqrt{3^{2}-4*1*[-3]}](https://tex.z-dn.net/?f=%5Csqrt%7B3%5E%7B2%7D-4%2A1%2A%5B-3%5D%7D) )/2*1
 )/2*1
     = (-3± )/2
)/2
     = (-3±√21)/2
   
 
        
             
        
        
        
Answer:
See proof below
Step-by-step explanation:
We have to verify that if we substitute  in the equation
 in the equation  the equality is true.
 the equality is true.
Let's substitute first in the right hand side:

Now we use the distributive laws. Also, note that  (this also works when the power is n-2).
 (this also works when the power is n-2).



then the sequence solves the recurrence relation.
 
        
             
        
        
        
Answer:
k x 1/2
Step-by-step explanation:
because k x 1/2 = k/2