Вправи 801- 887 » 830-831

830. Спрости вираз: г) (√(5+√24) + √(5-√24) )2 = 5 + √24 + 2√((5+ √24)(5- √24)) + 5 + √24 = 10 + 2√(25-24) = 10 + 2 = 12; 831. Спрости вираз: г) (√(6+√20) – √(6-√20) )2 = 6 + √20 – 2√((6+ √20)(6-√20)) + 6 – √20 = 12 – 2√(36-20) = 12 – 2 • √16 = 12 – 8 = 4.