Question: Let vec ( a ) = ( : 3 , - 2 , - 7 : ) and vec ( b ) = ( :

Let vec(a)=(:3,-2,-7:) and vec(b)=(:3,5,4:).
(vec(a)-vec(b))(vec(a)+vec(b))=
Let vec ( a ) = ( : 3 , - 2 , - 7 : ) and vec ( b

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