(z^6 - 8)(z^6 + 8) is the answer.
If you verify this by multiplying, you will see that:
(z^6 - 8)(z^6 + 8) = z^(6+6) + 8z^6 - 8z^6 - 64
= z^12 + 0 - 64
= z^12 - 64
Hope this helps,
Brian
        
             
        
        
        
Answer:
(-2)
Step-by-step explanation:
We have to find the determinant of the given matrix,

det A = (a - 1)(a² + a + 1) - (a + 1)(a² - a + 1)
          = a(a² + a + 1) - 1(a²+ a + 1) - a(a² - a + 1) - 1(a² - a + 1)
          = a³ + a² + a - a² - a - 1 - a³ + a² - a - a² + a - 1
          = (a³ - a³) + (-a² + a² - a² - a²) - 1 - 1
          = -2
Therefore, determinant of the given matrix is (-2).
 
        
             
        
        
        
5ft, 6 in. = 66 in 
66 x 4 = 264 in.
264 ÷ 12 = 22
Answer: A. 22 ft
        
             
        
        
        
all of them are the correct answer