10. (a) Given that
$$( 2 + x ) ^ { 5 } + ( 2 - x ) ^ { 5 } = A + B x ^ { 2 } + C x ^ { 4 }$$
find the values of the constants \(A , B\) and \(C\).
(b) Using the substitution \(y = x ^ { 2 }\) and your answers to part (a), solve,
$$( 2 + x ) ^ { 5 } + ( 2 - x ) ^ { 5 } = 349$$
[P2 June 2001 Question 8]