(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

http://puu.sh/1rcsO [Broken]

I got the first one from a simple scaling, but I can not figure out the second one.

2. Relevant equations

Det(cA) = cDet(A)

Scaling a row scales the determinant

Adding rows/columns to each other does not affect the determinant

Det(A^{T}) = Det A

3. The attempt at a solution

So, shouldn't I be able to scale http://puu.sh/1rcyZ [Broken] by -2, and just add row 2 and row 3 by multiples of row 1 ? I actually don't even think this is even close to right because the column 1 and 3 won't resemble each other at all once the row operations are done...

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# Homework Help: Scaling a row scales the determinant

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