What's the determinant of a 2x2 matrix?

[Noriaki]

What's the determinant of a 2x2 matrix?

Matrix:

A B
C D

What's the determininat?

 

[Locutus of Board]

69

 

[pen^2]

ah, cmon

AD-BC

 

[Viper GTS]

ad - cb

???

[EDIT]Damn I'm slow.[/EDIT]

Viper GTS

 

[cjchaps]

NEO/Keanu Reeves(spelling?)

 

[Alienwho]

calculators r0x0rz

 

[CivicSiRider]

What is this referring to, are you talking about a 2x2 design like in testing? or am I way off topic here?

 

[Noriaki]

It's linear algebra.

 

[HansHurt]

Sorry, I only do non-linear, or Metaphysical mathematics Noriaki...can't help you.

 

[pen^2]

are you enjoying your calc2?

 

[Mday]

it's high school math to me... =P

 

[pen^2]

yeah, it was supposed to be in my high school calc3 where i spent all my time sleeping thru it

 

[Mday]

i had it in precalculus.

i did calc 3 in high school. teacher could not teach it though. but it was pretty cool. gave me a better understanding of calculus, well the geometry end anyway.

now, analysis, that's a deeper understanding =)

 

[Pretender]

ugh matrices make me wanna puke. The lessons on 3d vectors and cross products of vectors made me want to shove my pencil up my nose and become dumb like Homer Simpson.

 

[goodoptics]

AD-BC

 

[beer]

Pretender -

Wasn't it a crayon that got shoved into Homer's brain?

 

[Pretender]

<< Pretender -

Wasn't it a crayon that got shoved into Homer's brain? >>

yeah, but I figure a pencil should do the job better. Besides, wouldn't it look suspicious if I used a crayon in High School?

 

[erub]

i had that in algebra 2...of course my precal was just a repeat of Alg 2...