1) x/x-5 и 3/5-x = 5x-x²/(x-5)(5-x) и 3x-15/(x-5)(5-x)
2) не знаю пока
3) 5/x+1 и 7/x-2 = 5x-10/(x+1)(x-2) и 7x+7/(x+1)(x-2)
1) x/x-5 и 3/5-x = 5x-x²/(x-5)(5-x) и 3x-15/(x-5)(5-x)
2) не знаю пока
3) 5/x+1 и 7/x-2 = 5x-10/(x+1)(x-2) и 7x+7/(x+1)(x-2)