For the upper triangular matrix U=(3−2405100−2)U = \begin{pmatrix} 3 & -2 & 4 \\ 0 & 5 & 1 \\ 0 & 0 & -2 \end{pmatrix}U=300−25041−2, what is det(U)\det(U)det(U)?
666
−30-30−30
151515
000