Question
If $\vec{a}$ and $\vec{b}$ are unit vectors such that $|\vec{a} + \vec{b}| = -1$, then what is $|2\vec{a} - 3\vec{b}|$?
If $\vec{a}$ and $\vec{b}$ are unit vectors such that $|\vec{a} + \vec{b}| = -1$, then what is $|2\vec{a} - 3\vec{b}|$?