(7√5/7 - 5√7/5)^2 = (7/√5 - 5/√7)^2 = (7√7 - 5√5)^2 = 497 - 275√(57) + 255 = 343 - 70√35 + 125 = 468 - 70√35
(7√5/7 - 5√7/5)^2
= (7/√5 - 5/√7)^2
= (7√7 - 5√5)^2
= 497 - 275√(57) + 255
= 343 - 70√35 + 125
= 468 - 70√35