Answer:

Step-by-step explanation:
It is a linear homogeneous differential equation with constant coefficients:
y" + 4y = 0
Its characteristic equation:
r^2+4=0
r1=2i
r2=-2i
We use these roots in order to find the general solution:

 
        
             
        
        
        
The question is incomplete as the cost price isn't given. However, taking the cost price as x :
Answer:
Kindly check explanation 
Step-by-step explanation:
Given :
A car costs$cents when new. It was sold for four fifths of its cost price. How much money was lost on the car.
Let :
Cost price when new = x
Cost price when sold = 4/5 * cost price when new 
Cost when sold = 4/5 of x = 4x/5 
Amount of money lost on the car = (Cost price of car when new - Cost of car when sold) 
Hence, 
Amount of money lost on the car = (x - 4x/5)
x - 4x/5 = (5x - 4x) / 5 = x / 5
To obtain the exact price, kindly input the omitted cost when new for x. 
 
        
             
        
        
        
72 ÷ 6 = 12 and 12 × 36 = 432 and 72 × 36 = 2,592 and 2,592 ÷ 6 = 432
 
        
                    
             
        
        
        
(x + 1) 
As:
(2x + 3)(x + 1) = 2x2 + 2x + 3x + 3
= 2x2 + 5x + 3
        
                    
             
        
        
        
Answer:
Y= 43, x=137, z=137 total is 360