book Maths Puzzle Numerical Ability

How would I go about simplifying this problem.

x^2-x-6 / x^2-9

Thank You for your help.

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book Other Question

I need some help with this problem.

Perform the indicated operation involving rational expressions:

(2x+6/7y) - (x^2+5/x^2+6x+9) the sum of two numbers is 99. the difference of the two is 17. fin the numbers.