In an Euclidean space E, the vectors u+v and u-v are orthogonal, and the vectors u and u+3e have the lengths 2 and 8 respectively. Find the inner product of the vectors u and v, and the length of the...

b2

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Extracted text: In an Euclidean space E, the vectors u+v and u-v are orthogonal, and the vectors u and u+3e have the lengths 2 and 8 respectively. Find the inner product of the vectors u and v, and the length of the vector B.2 2u - v.