Question: in question 5 show that In question 5 , show that [ 1 2 3 8 ] is a unit in the ring M 2

in question 5 show that In question 5, show that [1238] is a unit in the ring M2(Q) but not a unit in M2(Z).(10 pts.)
in question 5 show that In question 5, show that [1238]

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