Jambmaths question:
If $P=\left( \begin{matrix} 1 & 3 & 2 \\ 4 & 5 & -1 \\ -3 & 2 & 0 \\\end{matrix} \right)$find the determinant of matrix P
Option A:
–75
Option B:
–57
Option C:
57
Option D:
75
Jamb Maths Solution:
$\left| P \right|=\left| \begin{matrix} 1 & 3 & 2 \\ 4 & 5 & -1 \\ -3 & 2 & 0 \\\end{matrix} \right|=1(0+2)-3(0-3)+2(8+15)=2+9+46=57$
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