Question

Find ∥u∥2 if u=⟨−6,−3,−3⟩.

Answer 1

Solution in attached photo.

Explanation:

Solution

Steps are in the attached photo, do note for this question, the units for vectors are called 'units'. Also do note that square roots and squared will cancel out each other (Power 2 x Power Half = Power 1).

Edit: I have included solutions for both scenarios for reference.