а) (√4)² = 4
б) (√1,391)² = 1,391
в) (√(1 13/17))² = (√(30/17))² = 30/17 = 1 13/17
Ответ: (√4)² = 4 (√1,391)² = 1,391 (√(1 13/17))² = 1 13/17