Answer:
27p4-27p2-12p+12/p
Step-by-step explanation:
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It is answer is choice d in my opinion
Lets say the 3x3 Matrix is
M = [1 5 2 ]
[1 1 7 ]
[0 -3 7 ]
We apply the Gauss-Jordan elimination method
(Procedure and result shown in the image below)