Question

pls solve this question , i want it fast

Answer 1

J^   K^    I^    J^
-2    +3    1     -2
+3    -1   +2    +3
------------------------
I^(2-9)+J^(6+1)+K^(3+4)=-7I+7J+7K
then magnitude of area=underroot -7 square +7 square +7 square
=underroot 147 =7underoot 3