Find value of the determinant

Engineering

Mathematics

Introduction to Determinants

Question

Find value of the determinant
$A = ∣ \begin{array}{cc} 3 & 2 \\ 5 & 7 \end{array} ∣$

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$A = ∣ \begin{array}{cc} 3 & 2 \\ 5 & 7 \end{array} ∣ = 3 (7) - 2 (5) = 21 - 10 = 11$

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