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Hi!

The quantity (absolute value vectorA x vectorB close absolute value)^2 + (absolute value vectorA * vectorB close absolute value)^2 is equivalent to:

I am confused, a close example used numbers in place of the vectors so I gave it a try in a book I have. I know because its absolute that the numbers would be positive then all I would have to do is square those values and then solve. Nope! I must have done something wrong because it doesn't match any of the answers found. I thought the answer was vectorA^2 + 2AvectorA * vectorB but I really guessed so I am not to sure what to do for this problem. Anyone want to help me please?

Dx

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# Dot and cross product vector

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