##### Matrix operations - part 7

###### Find the determinant of the matrix:

8

-18

42

50

Correct Answer

Incorrect Answer

How to get the right answer:

= 4 X 7 - 2 X -9 = 24 - (-18) = 24 + 18 = 428

-18

42

50

Correct Answer

Incorrect Answer

How to get the right answer:

= 4 X 7 - 2 X -9 = 24 - (-18) = 24 + 18 = 42