Answer:
216 ft³
Step-by-step explanation:
h*w*l=v

 
        
             
        
        
        
(x+2y+z) (x-2y-z)
= x^2 - 2xy - xz + 2xy - 4y^2 - 2yz + xz - 2yz - z^2 = x^2 - 4y^2 - 4yz -z^2
Hope it helped!
        
             
        
        
        
Answer: A
Step-by-step explanation:
The total area would have to be 1, so (1/2)(5)(height)=1
2.5height = 1
height = 1/2.5 = 2/10 = 1/5
 
        
             
        
        
        
6x2+x−1 use the FOIL method