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_Bd_

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## Homework Statement

Evaluate the following determinant by expressing the matrix in upper triangular form.

## Homework Equations

row operations.

## The Attempt at a Solution

http://yfrog.com/jnscan0001ugj

http://img707.imageshack.us/img707/6379/scan0001ug.jpg

[PLAIN]http://img707.imageshack.us/img707/6379/scan0001ug.jpg

I want to know what I did wrong there cause I can't figure it out

the calculator shows a different answer.

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