WEBVTT

1
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Here is the problem: [[4, 6], [2, 3]].

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Find the determinant of a 2 times 2 matrix.

3
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Read the 2 times 2 matrix.

4
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Use ad minus bc for a 2 times 2 matrix.

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So the answer is det(A) equals 0.

6
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The determinant is 0, so the matrix is singular: it has no inverse and its rows are linearly dependent.

7
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Computed exactly with fractions; row reduction gives the same value 0.