Find whether x and y are rational or irrational in the following
(i) a = 2 + \(\sqrt { 3 } \) , B = 2 - \(\sqrt { 3 } \) ; x = a + b,Y = a+ b
(ii) a = \(\sqrt { 2 } \) + 7, B = \(\sqrt { 2 } \) - 7 ; x = a + b, Y = a - b
(iii) a = \(\sqrt { 75 } \), b = \(\sqrt { 3 } \), x = ab, y = \(\frac { a }{ b } \)
(iv) a = \(\sqrt { 18 } \), b = \(\sqrt { 3 } \), x = ab, y = \(\frac { a }{ b } \)
