Question 1066290
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On determinant of 2x2-matrices read the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/Matrices-and-determiminant/Determinant-of-a-2x2-matrix.lesson>Determinant of a 2x2-matrix</A> 

in this site.


Read the definition of the determinant and how to calculate it.
After reading calculate your determinant.
And do not say that you don't know how to do it.


If after reading the lesson you are not able to compute the determinant, it means that you are in wrong class.