Homework Help

If A and B are 4x4 matrices, det(A) = -4, det(B) = 3, then (e) det(B^2) = ???,

johnyyyynnynyn's profile pic

Posted via web

dislike 1 like

If A and B are 4x4 matrices, det(A) = -4, det(B) = 3, then

(e) det(B^2) = ???,

2 Answers | Add Yours

tiburtius's profile pic

Posted (Answer #2)

dislike 1 like

`det(B^2)=det(B)det(B)=3cdot3=9`

mvcdc's profile pic

Posted (Answer #3)

dislike 1 like

Note the solving for determinants is distributive:

Hence, 

I'm sorry. We are solving for `det(B^2)`

Using the same technique, `det(B^2) = det(BB)=det(B)det(B)=[det(B)]^2 = 3^2 = 9`

Sorry, got confused with the numbers.

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes