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The value of (axxb)^2 is | vec a|^2+| ve...

The value of `(axxb)^2` is `| vec a|^2+| vec b|^2-( vec adot vec b)^2` b. `| vec a|^2| vec b|^2-( vec adot vec b)^2` c. `| vec a|^2+| vec b|^2-2( vec adot vec b)^2` d. `| vec a|^2+| vec b|^2- vec adot vec b`

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