Answer:
-18
Step-by-step explanation:
Hope it helps....................................................
 
        
             
        
        
        
There are two ways to work this out: normal variables or using "imaginary" numbers.
Normal variables:
![(7+2i)(3-i)\\(7*3)+[7*(-i)]+(3*2i)+[2i*(-i)]\\21-7i+6i-2i^{2}\\\\21-i-2i^{2}](https://tex.z-dn.net/?f=%20%287%2B2i%29%283-i%29%5C%5C%287%2A3%29%2B%5B7%2A%28-i%29%5D%2B%283%2A2i%29%2B%5B2i%2A%28-i%29%5D%5C%5C21-7i%2B6i-2i%5E%7B2%7D%5C%5C%5C%5C21-i-2i%5E%7B2%7D)
Imaginary numbers:
Using the result from earlier:

Now since 

, then the expression becomes:
 
 
        
        
        
Answer: m=-1, b=-2
Step-by-step explanation:
 
        
             
        
        
        
Alright so
5^4m = 5^12
cancel the bases
4m=12
divide by 4
m=3
        
             
        
        
        
Answer:
Paul is correct 2 divided by 2 equals 1
Step-by-step explanation:
If you divide 2 by 2 you get 1 because 2×2=4 and 2×1=2