Question 347596
{{{D=-19}}}
I used EXCEL's MDETERM function with your matrix.
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You could also calculate by hand,
{{{D=-2(5(-1)-(-2)(8))-1(-2(0)-(-1)(-3))}}}
{{{D=-2(-5+16)-1(-3)}}}
{{{D=-2(11)+3}}}
{{{D=-22+3}}}
{{{D=-19}}}