gjhfdfg
Can someone tell me where I went wrong evaluating this matrice?



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gjhfdfg
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Started out with this,
dw:1361293377316:dw

gjhfdfg
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I'm just gonna type what I did next,

gjhfdfg
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3( 0  0)  (3) (60)  (3) (15  0)

gjhfdfg
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3(0)  (3)(6)  (3) (15)
0  (18)  (3) (45)

gjhfdfg
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I didnt solve it completely. I knew it wasnt going to come out right.

nubeer
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hmm you trying to find determinant?

nubeer
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dw:1361293847269:dw

gjhfdfg
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Noo, I'm suppose to evaluate it

nubeer
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well u did a sign mistkae i corrected it.

gjhfdfg
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Alright, still doesnt change much

nubeer
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03(5) +3 (5*3)
01545
i think should be soemthing like this

phi
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the last 3 should be +

gjhfdfg
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Ah, I was following a video tutorial on how to do these & the guy changed the last 2 signs.
So I thought I had to do the same.
So my answer is 30