5)there is which is defined by where

A)check if this function is a simetric bilenear.

B)find the representative matrices by the standart basis of

C)find the jordan form of the matrices you found in part B

D)check if for every

??

regarding A:

f is simetric if f(x,y)=f(y,x) so i need to prove that

but when i put the given and i get two different expressions

?