\(\left|\begin{array}{rrr} -1 & 2 & 0\\ 3 & 1 & 5\\ -2 & 0 & 1 \end{array}\right|=(-1)(1)(1)+(3)(0)(0)+(-2)(2)(5)-[(-2)(1)(0)+(3)(2)(1)+(-1)(0)(5)]=-27\)