A bilinear form is just a type of function. Therefore, addition of bilinear forms is just regular function addition: pointwise addition.
If $f, g$ are bilinear forms then
$$(f+g)(v, u) = f(v, u) + g(v, u)$$
A bilinear form is just a type of function. Therefore, addition of bilinear forms is just regular function addition: pointwise addition.
If $f, g$ are bilinear forms then
$$(f+g)(v, u) = f(v, u) + g(v, u)$$