matrix in math 22

[mido4help]

What was answer of matrix of math 22
(0)
(12 12 )
(-8 18 )

 

[Nibz]

No paper discussion now ( against XPF rules)
You can discuss the paper after 24 hours, though.
Thank you

 

[songjihyo]

hey, u know for that matrix (12 12)
(-8 18)
are we allowed to simplify it to (6 6) ?
(-4 9)

 

[WayneRooney10]

no!! why would you simplify a matrix??? :fool:

 

[tripleA95]

Wasn't it (12 12) or is it 0?

 

[Luzzo95]

The first one was 1x1 matrix and the answer was (0)

 

[Arcticmonkey]

i got (0) for both of them

 

[Luzzo95]

Nah the second one was a 2x2 matrix and the third one was an inverse of the matrx C multiplied with 1/2 (2 was the determinant)

 

[haochen]

the first one is 0
the second answer is 12 ? ? ?
the thrid is 1/2 ? ? ? (but all are half but some are negative)

 

[Luzzo95]

Second one was a 2x2 matrix , not a 1x1

 

[haochen]

yeah its 12 ? ? ?

 

[tripleA95]

I lost 2 marks :/

 

[haochen]

why ??

 

[Luzzo95]

how?
ithink ill get 69/70
remember the second function question ?

 

[haochen]

i dont remember the question and answer but the last function answer is 2^2x+2