Q5 of 26 Page 1

If and find

Given:


Formula: |AB| = |A||B|


Now calculating the determinant of A and B separately



|A| = ( - 1)(1) – (2)(3)


|A| = - 7



|B| = ( - 2) (1) – ( - 4) (3)


|B| = 10


Therefore, |A||B| = (10) ( - 7) = - 70


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