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How do you find the determinant of $[(-5,7), (5,8)]$ ?

1 Answer

Nov 23, 2016

-75

Explanation:

$det ( (-5,7), (5,8) ) = |(-5,7), (5,8)|$

$= (-5)(8) - (5)(7)$
$= -40 - 35$
$= -75$

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