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Find the Value of the Determinant $\left| \begin{array} { l l } a & b \\b & a\end{array} \right|$

Question 157

Multiple Choice

Find the value of the determinant.
- $\left| \begin{array} { l l } a & b \\b & a\end{array} \right|$

A) $a ^ { 2 } - b ^ { 2 }$
B) $a ^ { 2 } + b ^ { 2 }$
C) $2 a b$
D) 0

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