anonymous
  • anonymous
How would you find the determinant of : ⎡3 2⎤ ⎣6 4⎦ Without using a calculator?
Algebra
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
jamiebookeater
  • jamiebookeater
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
TheRealMeeeee
  • TheRealMeeeee
ok You actually do it the same way for any size matrix: you pick a row and column, and multiply the value for each element in the row by the "cofactor" or "minor" (the smaller determinant found by eliminating the row and the column of the element that you're working with). | 5 2 0 0 -2 | | 0 1 4 3 2 | | 0 0 2 6 3 | | 0 0 3 4 1 | | 0 0 0 0 2 | This particular matrix is pretty easy, because it has a lot of zeros. So if you start with the last row, you get: 2 x | 5 2 0 0 | | 0 1 4 3 | | 0 0 2 6 | | 0 0 3 4 | Then, using the first column, you'd get: 2 x 5 x | 1 4 3 | | 0 2 6 | | 0 3 4 | Then again using the first column: 2 x 5 x 1 x | 2 6 | | 3 4 | 2 x 5 x 1 x (2 x 4 - 3 x 6) = -100
TheRealMeeeee
  • TheRealMeeeee
do this help
anonymous
  • anonymous
@DestisaurusRex lol do not listen to this guy ^^^ he copies answers! he got it from here http://answers.yahoo.com/question/index?qid=20070123154335AAIVKZd

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

TheRealMeeeee
  • TheRealMeeeee
omg no idid not u just a stalker
anonymous
  • anonymous
Yes you did.You have the same words plus you did the same thing to the other questions.
anonymous
  • anonymous
And its obvious its not from you cause you dont even know basic grammar
TheRealMeeeee
  • TheRealMeeeee
omg girl no i didnt not stalker
alekos
  • alekos
she's right i'm afraid
alekos
  • alekos
leave maths to the real mathematicians
alekos
  • alekos
for a 2x2 determinant \[\left[\begin{matrix}a & b \\ c & d\end{matrix}\right]\] it's ad - bc
alekos
  • alekos
no calculator required. should be able to do it in your head

Looking for something else?

Not the answer you are looking for? Search for more explanations.