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OpenStudy (anonymous):
Can someone please help me with this question?
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OpenStudy (anonymous):
OpenStudy (anonymous):
Question is attached, I just need to know how to do it.
OpenStudy (tkhunny):
It is a 2x2 Determinant. You must memorize the pattern of evaluation. |dw:1413429256146:dw| It's not magic. It's just how to do it.
OpenStudy (anonymous):
Oh ok, so its essentially a matrix, thank you!
OpenStudy (tkhunny):
Well, it is a construct from a matrix.
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