Ответ:
3 * (5 - (5)^(1/2))
Пошаговое объяснение:
((17*(6/7))^(1/2) - (6*(3/7))^(1/2)) / (5/63)^(1/2)
(((17*7+6)/7)^(1/2) - ((6*7+3)/7)^(1/2)) * (63/5)^(1/2)
((125/7)^(1/2) - (45/7)^(1/2)) * (63/5)^(1/2)
(125/7)^(1/2) * (63/5)^(1/2) - (45/7)^(1/2) * (63/5)^(1/2)
(125/7 * 63/5)^(1/2) - (45/7 * 63/5)^(1/2)
(125/5 * 63/7)^(1/2) - (45/5 * 63/7)^(1/2)
(25*9)^(1/2) - (5*9)^(1/2)
5*3 - 3*(5)^(1/2) = 3 * (5 - (5)^(1/2))
вроде так