\(\bf \begin{cases}
u = \ \textless \ -3, 7\ \textgreater \ \\
v = \ \textless \ 5,1\ \textgreater \ \\
--------------\\
v-u\\
\ \textless \ 5,1\ \textgreater \ -\ \textless \ -3,7\ \textgreater \ \\
\ \textless \ 5-(-3)\ ,\ 1-7\ \textgreater \ \\
\qquad a\qquad \quad \quad b
\end{cases}
\\\\\\
||v-u||\implies ||\ \textless \ a,b\ \textgreater \ ||\implies \sqrt{a^2+b^2}\impliedby magnitude\)
