Подготовка к экзамену по алгебре. 2 вариант.

1. Упростите выражение: [tex]\frac{a^2-b^2}{a^2-2ab+b^2} * (a-b)[/tex]

2. Решите систему уравнение: [tex]\left \{ {{\frac{y+3}{2} \ \textless \ \frac{y-5}{3}} \atop {\frac{y+1}{4} \ \textless \ \frac{y-4}{5}} \right.[/tex]
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