radicals question

[Wingsky]

Pls refer to the attached image, and help...thanks...

 

[Wingsky]

Please help to solve

 

[stapel]

Pls refer to the attached image, and help...thanks...

Okay; your textbook gave you various formulas, rules, algorithms, or other helps, in the worked examples; and you saw more worked examples in class, so you've got those in your class notes (probably similar to what is explained here, here, here, here, here, here, and here, for instance). How far have you gotten in applying that information? Where are you getting bogged down?

Please be complete. Thank you!