How do you find the determinant of $((1, 2), (1, 3))$ ?

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Answer 1 · 2016-10-31T21:33:51

$|(1,2),(1,3)| = 1$

If we have a matrix $A = ((a,b),(c,d))$ , then the determinant of $A$ denoted $det(A)$ or $|A|$ is calculated as:
$|A| = det(A) = a * d - b*c$

$:. |(1,2),(1,3)| = (1)(3) - (2)(1)$
$:. |(1,2),(1,3)| = 3 - 2$
$:. |(1,2),(1,3)| = 1$

How do you find the determinant of ((1, 2), (1, 3))((1, 2), (1, 3))?