Сократите дробь под буквой е

Question

Сократите дробь
под буквой е

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Answer 1

N*2+2n+1=(n+1)(n+1)
n*2+5n+4=(n*2+2n+1)+3n+3=(n+1)(n+1)+3(n+1)=(n+1)(n+1+3)=(n+1)(n+4)

(n+1)(n+1)/(n+1)(n+4)=(n+1)/(n+4)

Answer 2

(N+1)^2/(n+1)(n-4)=(n+1)/(n+4)