Answer:
x= C-a/b 
Step-by-step explanation: Ik alllLlLLlllLlLL
(my other account is actingqueen2468 but i forgot my password) 
 
        
             
        
        
        
bing jhwwjwiwisisuwuwywywywfsfsahajai
 
        
             
        
        
        
You would expand becausee it isn't equal to anything
(x+3)^3=(x+3)(x+3)(x+3)
we can use binomial theorem or pascal's triangle
anyway, pascal's triangle is more practicl for this one
so 
for the 3rd power

a=x
b=3

=
 
 
        
        
        
The answers for the problems are: 6. -18
9. 6
12. -40
        
             
        
        
        
(1.5) decimal form (mixed number form= 1/2-1) hope this helps.