UPSKILL MATH PLUS

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1. (i) Add \(3 \sqrt{7}\) and \(5 \sqrt{7}\). Check whether the sum is rational or irrational.
 
 
(ii) Subtract \(4\sqrt{5}\) from \(7\sqrt{5}\). Is the answer rational or irrational?
 
 
 
2. Simplify the following:
 
(i) \(\sqrt{63} - \sqrt{175} + \sqrt{28}\) \(=\)
 
(ii) 2403+3625343203 \(=\) iii