Question

Сократите дробь: a^3-a/a^4-1

Answer 1

$\frac{a^3-a}{a^4-1}= \frac{a(a^2-1)}{(a^2-1)(a ^{2}+1) }= \frac{a}{a ^{2}+1}$

Answer 2

$\frac{a ^{3} -a}{a ^{4}-1 } = \frac{a(a ^{2} -1)}{(a ^{2} -1)(a ^{2} +1)} = \frac{a}{a ^{2} +1}$