19 баллов!!!!Срочно!!!!

Question

19 баллов!!!!Срочно!!!!

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Comments

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Answer 1

1)((a-5)(a+5)/(a+3)*1/[a(a+5)]=(a-5)/[a(a+3)]
2)(a-5)/[a(a+3)]-(a+5)/[a(a-3)]=(a²-3a-5a+15-a²-3a-5a-15)/[a(a²-9)]=
=-16a/[a(a²-9)]=16/(9-a²)