This problem requires the use of the product rule.

The product rule tells us that the derivative of,

  is .

In this problem,  is , and  is .

Therefore,

, and  = , so

  , and factoring out  gives us .

To find the general solution of , rewrite this in the form of its characteristic equation. This will be a quadratic.

Factorize and solve for the roots.

Since the roots are distinct, write the specific form of the general solution stated by one of the three homogenous equation rules.

Substitute the roots in the formula to obtain the general solution.

To solve for the general solution of , convert this to its characteristic equation and solve for the roots.

Write the specific form of the general solution stated by one of the three homogenous equation rules for distinct roots. 

Substitute the roots to obtain the general solution.

Let . Find .

(Hint: Use differential equations.)

Start with 

First, take the natural logarithm of both sides:

Simplify:

Take the derivatives:

Multiply both sides by :

Substitute the original equation for :

We begin by factoring out the y term on the right side, then dividing it over and multiplying the x differential over:

We then integrate both sides in the proper direction to get:

To be able to flip the right side of the equation it is necessary to find a common denominator for each term, so we get:

We then multiply by negative 1 and flip the equation.

Homogeneous first order differential equations can always be solved by brute force using the method of an integrating factor. However, this differential equation is simple enough to use a different method. First, we set the derivative equal to the second term:

Then we think: The only way that a derivative can be equal to a scalar multiplication of the original function is if the derivative does not change the change the function in any way other than multiplying it by some constant. The only function that holds this property is the exponential function. Then, we can assume that

 for some r.

Then, we differentiate this function and substitute the values into the differential equation

.

We begin by separating the equation:

We then integrate each side of the equation using the power rule,

 and special case that  to get,

.

We then exponentiate to get

.

Looking over our problem, we have a composite function , where  and . We are trying to find the derivative of , or , which by the Chain Rule can be defined as 

Therefore:

The differential equation  can be rewritten as .

The next step is to multiply by  and divide by  to get the x terms and the y terms on the same side as  and , respectively.

Next, integrate both sides of the equation  

 .

The rules used for the integration are

, where n=2 in this example, and . 

The solution of the integration is as follows: 

.

After, both sides of the equation are exponentiated using e (to remove the natural log): 

.

To simplify,  can be rewritten as .  

Then, to isolate y, subtract 3 and divide both sides by 2:

 .

Note that  and were  changed to just C, because they are themselves another constant of integration. 

 To solve the differential equation, you first seperate the x and y variables: 

.

Then, integrate on both sides: 

 which is equal to: .

This integration was performed using the rules

 and .

(The constant 2 had no part in the integration and was therefore unchanged.) Note that there is only one constant of integration, C, in the entire equation. This is the general solution of the differential equation. We want the particular solution at the point , though. So, you plug in that point into the equation to solve for C: 

. The natural log of one is zero, so .

The final answer, which doesn't contain C, is .