Jambmaths question:
Find the value of $\left| \begin{matrix} 0 & 3 & 2 \\ 1 & 7 & 8 \\ 0 & 5 & 2 \\\end{matrix} \right|$
Option A:
–1
Option B:
–2
Option C:
12
Option D:
10
Jamb Maths Solution:
$\begin{align} & \left| \begin{matrix} 0 & 3 & 2 \\ 1 & 7 & 8 \\ 0 & 5 & 2 \\\end{matrix} \right|=0(28-40)-3(2-0)+2(5-0) \\ & =0-6+10=-4 \\\end{align}$
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