Since the number is 8 you round up so it's 9.0
        
             
        
        
        
Answer:
Step-by-step explanation:
y = (x^2 + 4x)      + 2
Take 1/2 of the linear term 4/2 = 2 and square that result. 2^2 = 4.
Put it after 4x
y = (x^2 + 4x + 4)   +2  Subtract what you put inside the brackets on the outside.
y = (x^2 + 4x + 4) + 2 - 4      Combine the right.
y = (x^2 + 4x + 4) - 2            Express the brackets as a square.
y = (x + 2)^2 - 2
That's your answer
a = 1
h = 2
k = -2
 
        
             
        
        
        
3. 140 m^3
(3 x 6 x 7) + (1 x 2 x 7) = 126 + 14 = 140
4. 216 in^3
(4 x 4 x 9) + (3 x 4 x 6) = 144 + 72 = 216