Proving a matrix is always symmetric

Question

$B$ is a square matrix of real numbers. Show that the matrix $BB^T$ is always symmetric.

Answer 1

$$(BB^t)^t=(B^t)^tB^t........$$

Answer 2

$(B\cdot B^{t})^{t} = (B^{t})^{t}\cdot B^{t}= B\cdot B^{t}$