SOLUTION: hope you can help i₁ + 8i₂ +3i₃ =-31 3i₁ - 2i₂ + i₃ =-5 2i₁ - 3i₂ + 2i₃ = 6 solve for i₁, i₂,i₃

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: hope you can help i₁ + 8i₂ +3i₃ =-31 3i₁ - 2i₂ + i₃ =-5 2i₁ - 3i₂ + 2i₃ = 6 solve for i₁, i₂,i₃       Log On


   

Question 902108: hope you can help
i₁ + 8i₂ +3i₃ =-31
3i₁ - 2i₂ + i₃ =-5
2i₁ - 3i₂ + 2i₃ = 6
solve for i₁, i₂,i₃
Thanks
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Use Cramer's rule.
A=%28matrix%283%2C3%2C1%2C8%2C3%2C3%2C-2%2C1%2C2%2C-3%2C2%29%29
abs%28A%29=-48
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A%5B1%5D=%28matrix%283%2C3%2C-31%2C8%2C3%2C+-5%2C-2%2C1+%2C6%2C-3%2C2%29%29
abs%28A%5B1%5D%29+=240
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A%5B2%5D=%28matrix%283%2C3%2C1%2C-31%2C3%2C++3%2C-5%2C1+%2C2%2C6%2C2%29%29
abs%28A%5B2%5D%29++=192
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A%5B3%5D=%28matrix%283%2C3%2C1%2C8%2C-31%2C++3%2C-2%2C-5%2C2%2C-3%2C6%29%29
abs%28A%5B3%5D%29++=-96
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i%5B1%5D=abs%28A%5B1%5D%29%2Fabs%28A%29
i%5B1%5D=240%2F%28-48%29
i%5B1%5D=-5
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i%5B2%5D=abs%28A%5B1%5D%29%2Fabs%28A%29
i%5B2%5D=192%2F%28-48%29
i%5B2%5D=-4
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i%5B3%5D=abs%28A%5B1%5D%29%2Fabs%28A%29
i%5B3%5D=%28-96%29%2F%28-48%29
i%5B3%5D=2
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