anonymous
  • anonymous
Find the determinant of the following: |3 -3| |-1 2|
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
is this one matrices? or two
anonymous
  • anonymous
Just matrix. one
anonymous
  • anonymous
ok. then the determinent is 1/(ad-bc), where a is top left, b is top right, c is bottom left and d is bottom right. that help?

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anonymous
  • anonymous
Not really. Whats the answer?
anonymous
  • anonymous
I got 1/3. is that what you got?
anonymous
  • anonymous
No this is what I got, |dw:1320713982160:dw| And I just looked at my notes and its not matrix I don't think.
anonymous
  • anonymous
Oh, you're right, sorry my mistake :) I was going one step further towards finding the inverse lol your answer's right!
anonymous
  • anonymous
I'm confused because we learned how to do it this way last week but now we're doing Matrix and it looks the same and the direstions don't tell me anything
anonymous
  • anonymous
Thank You! Btw I think it's Called Cramers rule(:
anonymous
  • anonymous
oooh ok thanks :D lol
Zarkon
  • Zarkon
Cramer's rule is a way to use determinants to solve some systems of equations. if \[A=\left[\begin{matrix}a & b \\ c & d\end{matrix}\right]\] then \[|A|=ad-bc\] always

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