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Find the determinant of a 2 × 2 matrix

DIFFICULTYintrostandardchallengeexam
Question 1 of 8

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The matrix \(B\) is shown below

\[B = \begin{bmatrix} 9 & 9 \\ 1 & 3 \end{bmatrix}\]
2 marks

Evaluate \(\det(B)\)