I believe that the mean is 6
        
             
        
        
        
Answer:

Step-by-step explanation:
Given
 -- Leading coefficient
 -- Leading coefficient

Required
Determine the polynomial
Represent the zeros with a and b
Such that


The polynomial is:


However, to solve further: We need to symmetrise over 3-i  and its conjugate


To define a suitable function, the expression becomes




Open bracket



 
        
             
        
        
        
Its 2.8, just multiply?<span />
        
             
        
        
        
Answer:
Total area to be painted in gold = 24000 cm²
Step-by-step explanation:
Total height of the stairs = 120 cm
Total standing stairs = 4
Therefore, height or width of one standing stair as shown in the picture, 
=  
 
= 30 cm
Length of every stair has = 100 cm
Every horizontal and vertical stair has the same area.
Area of one stair = Length × Width
                             = 100 × 30 
                             = 3000 cm square
There are 4 horizontal and 4 vertical similar stairs to be painted in gold.
Total area to be painted in gold = 8 × Area of one stair
                                                      = 8 × (3000)
                                                      = 24000 cm²
Total area to be painted in gold = 24000 cm²