To solve this problem you must apply the proccedure shown below:
1. You have the following expression given in the problem above:
7/x^2-3x - 1/x^2-9
2. When you factor the denominator, you obtain:
7/x(x-3) - 1/(x+3)(x-3)
3. By simplifying the expression, you obtain:
3(2x+7)/x(x+3)(x-3)
3(2x+7)/x(x^2-9)
The answer is: 3(2x+7)/x(x^2-9)