if A and B are symmetric matrices, then ABA is
a-symmetric
b-skew-symmetric
c-diagonal
d-scalar
it is symmetric matrix as (ABA)' = (A)'(AB)' = AB'A =ABA
hence it is symmetric matrix.
if A and B are symmetric matrices, then ABA is
a-symmetric
b-skew-symmetric
c-diagonal
d-scalar
it is symmetric matrix as (ABA)' = (A)'(AB)' = AB'A =ABA
hence it is symmetric matrix.