35X^ (5) Y^ (7) Z^ (2) /21X^ (3) Y^ (8) Z^ (2) -14A^ (2) — 7AB / B^

35X^ (5) Y^ (7) Z^ (2) /21X^ (3) Y^ (8) Z^ (2)=5X^2/3Y -14A^ (2) — 7AB / B^ (2) -4A^ (2) 1) -14A^2-7AB=-7A*(B+2A) 2) B^2-4A^2=(B-2A) (B+2A) Теперь получаем: -14A^ (2) — 7AB / B^ (2) -4A^ (2)=-7A*(B+2A) / (B-2A) (B+2A)=-7A/B-2A