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How do you expand and simplify this one?
(2u+v).(u-2v)
=2u.u+2u.(-2v)+v.u+v.(-2v)
Where u and v are vectors and the "." is the dot. I did some but after this im lost, how can I continue?
(2u+v).(u-2v)
=2u.u+2u.(-2v)+v.u+v.(-2v)
Where u and v are vectors and the "." is the dot. I did some but after this im lost, how can I continue?