anonymous
  • anonymous
GIVING A MEDAL Solve this system of equations using the inverse of a matrix. -x + y = 8 4x + 3y = 12 x − 7y + z = 15 [Hint: AX = B and X = BA-1]
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
|dw:1436974495585:dw|
anonymous
  • anonymous
im confused
anonymous
  • anonymous
do you know how to take the inverse of a function?

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anonymous
  • anonymous
i think it is better to solve by cramer's rule
anonymous
  • anonymous
@Michele_Laino sorry,but can you solve this also
Michele_Laino
  • Michele_Laino
here we have to compute the inverse of the subsequent matrix: \[\Large \left( {\begin{array}{*{20}{c}} { - 1}&1&0 \\ 4&3&0 \\ 1&{ - 7}&1 \end{array}} \right)\]
Michele_Laino
  • Michele_Laino
which I call with A^-1. After that if I write: \[\Large AX = B\] then I can write: \[\Large X = {A^{ - 1}}B\]

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