# Let #[(x_(11),x_(12)), (x_21,x_22) ]# be defined as an object called matrix. The determinant of of a matrix is defined as #[(x_(11)xxx_(22))-(x_21,x_12)]#. Now if #M[(-1,2), (-3,-5)]# and #N =[(-6,4), (2,-4)]# what is the determinant of #M+N# & #MxxN#?

##### 1 Answer

Apr 26, 2016

Determinant of is

#### Explanation:

One needs to define sum and product of matrices too. But it is assumed here that they are just as defined in text books for

Hence its determinant is

=

Hence deeminant of