Let u⃗=⟨2,−4,−6⟩\displaystyle \vec{{{u}}}={\left\langle{2},-{4},-{6}\right\rangle}, v⃗=⟨0,9,3⟩\displaystyle \vec{{{v}}}={\left\langle{0},{9},{3}\right\rangle}.

Then u⃗⋅v⃗=\displaystyle \vec{{{u}}}\cdot\vec{{{v}}}=  

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