x^{2} - 9/ x^{2} + 2x - 15

A: x+3/ x+5

B: 3/ 2x+5

C: x-1/ x-6

D: 9/ 15-2x

A is correct

Numerator (x +3) (x-3)

Denominator (x+5) (x-3)

Cancel off x-3

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