Напомните как решать плз

Question

Напомните как решать плз

---

---

Answer 1

А)(x⁵+x⁴+x³)/(x⁵-x⁴-x³)·(x⁵+x²)/(x⁵-x²)=x³(x²+x+1)/x³(x²-x+1)·x²(x³+1)/x²(x³-1)=
(x²+x+1)/(x²-x+1)·(x³+1)/(x³-1)=(x²+x+1)(x+1)(x²-x+1)/(x²-x+1)(x-1)(x²+x+1)=
(x+1)/(x-1)