atjari
Pls check if the working in the attachment is right.



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jerwyn_gayo
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where?

atjari
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Jst a moment.

atjari
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dw:1328477895336:dw

Directrix
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2 ??

atjari
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sorry?

Directrix
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Are the instructions here to find the determinant of a matrix?

atjari
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ya

Directrix
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Ok, I used x for the variable and got x^2  4x + 11 which corroborates with your answer. Congrats!

atjari
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thanx a lot for ur help.