anonymous
  • anonymous
For these matrices: S=[u,v,-v,u] T=[x,y,-y,x] NOTE: these matrices are 2x2 matrices, the first two on the top row and the last two on the bottom row. (sorry I can't express them properly here). a) Find the determinants of S, T and ST b) Use ordinary algebra to verify that det(S)det(T)=det(ST) c) Express (7^2 + 2^2)(4^2 + 1^2) as a sum of squares of two integers.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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dumbcow
  • dumbcow
for any 2X2 matrix a b c d det = ad - bc
myininaya
  • myininaya
give me just a sec k?
myininaya
  • myininaya
i will scan what i have so far... it isn't complete

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myininaya
  • myininaya
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anonymous
  • anonymous
thanks everyone - especially myininaya :)
myininaya
  • myininaya
i was fixing to type this i think i will just scan it lol
anonymous
  • anonymous
good idea, much easier :)
myininaya
  • myininaya
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myininaya
  • myininaya
you know a^2+2ab+b^2=(a+b)^2 and a^2-2ab+b^2=(a-b)^2 right?
anonymous
  • anonymous
yes
myininaya
  • myininaya
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myininaya
  • myininaya
do you see i add in a zero so I could write (ux-vy)^2+(vx+yu)^2
anonymous
  • anonymous
yes indeed :) thank you so much!!!
myininaya
  • myininaya
k cool are there any questions? please let me know if you don't understand something
anonymous
  • anonymous
i think i understand it all :) thanks :)

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