Here is an example I did of the problem hope it helps let me know if you need anything else~!
~<span>Cecildoesscience </span>
 
        
        
        
It's an expression that can be simplified to read
       ( 0.7  x  0.4 ) ( b³  x  b⁹ )
   =  (      0.28    )  (    b¹²      )  =  0.28 b¹² .
        
             
        
        
        
Solution (1) using angles of sectors:
Area of A = pi r^2  x 90/360 = 4.9
Area of B = pi r^2 x 270/360 = 14.2 
Check:  Area of A/B = 4.9/14.72 = 1/3 (as given)
Solution (2) using given info:
Area of B + Area of A = area of circle
Area of B + 1/3 Area of B =  3.14 * (2.5)^2 = 19.625
4/3 Area of B = 19.625
Area of B = 3/4 * 19.625
Area of B = 14.72
Area of A = 1/3 * 14.72 = 4.9
There is more solutions to this problem , like polar coordinate integration , and so on. for more just request. 
        
             
        
        
        
Answer:
70
Step-by-step explanation:
Substitute x with -6:
2(-6)²-2
2(36)-2
72-2
70