Answer:
 =  - 12 + 316 i
 =  - 12 + 316 i
Step-by-step explanation:
Given that - 
z = 3 + i
<em> =
 =  </em>
</em>
<em> = 9 +
 = 9 +  + 6 i</em>
 + 6 i</em>
<em> = 9 - 1 + 6 i</em>
 = 9 - 1 + 6 i</em>
 = 8 + 6 i
 = 8 + 6 i 
<em> =
 =  × z</em>
 × z</em>
<em> = ( 8 + 6 i ) × ( 3 + i )</em>
 = ( 8 + 6 i ) × ( 3 + i )</em>
<em> = 24 + 8 i + 18 i + 6 i²</em>
 = 24 + 8 i + 18 i + 6 i²</em>
<em> = 24 + 26 i - 6</em>
 = 24 + 26 i - 6</em>
 = 18 + 26 i
 = 18 + 26 i
 =
 =  ×
 × 
<em> = ( 8 + 6 i ) × ( 18 + 26 i )</em>
 = ( 8 + 6 i ) × ( 18 + 26 i )</em>
<em> = 144 + 208 i + 108 i + 156 i²</em>
 = 144 + 208 i + 108 i + 156 i²</em>
<em> = 144 + 316 i -156</em>
 = 144 + 316 i -156</em>
 =  - 12 + 316 i
 =  - 12 + 316 i
 
        
             
        
        
        
Answer:
84 degrees
Step-by-step explanation:
A right triangle is 90 degrees
90-4-2=84
 
        
             
        
        
        
Answer:
4 and 8
Step-by-step explanation:
The square of 4 is 16 and the square of 8 is 64.
16 + 64 = 80
 
        
             
        
        
        
Answer:
300
Step-by-step explanation:
This is a place value problem. 
  The given figure is; 
                 14, 397: 
Pronounced as; 
 Fourteen thousand, three hundred and ninety seven: 
           14, 397; 
                      10 000     ten thousand 
                        4000      four thousand 
                           300      three hundred 
                             90       ninety
                               7         seven
The place value of 3 is hundreds.