THESE KIND OF PROBLEMS HAVE A DIFFERENT APPROACH--->
LET B = A(N/2) --------------T(N/2)
C= 4 * B ----------------O(1)
D= N2 --------------O(1)
E= C+D------------------O(1)
M= X+ E ---------------O(1)
SO OVERALL TIME COMPLEXITY = T(N/2) + C (constant)
=O(logn) answer.
this is how it will be done and this is the correct approach.