Answer
$\lt -1,-1 \gt$ and $\sqrt {2}$
Work Step by Step
The formula to find the magnitude of a vector is:
$|n|=\sqrt{n_1^2+n_2^2}$
Here, $u+v=\lt -3,4 \gt + \lt 2,-5 \gt =\lt -1,-1 \gt$
and $|\lt -1,-1\gt|=\sqrt{(-1)^2+(-1)^2}=\sqrt {2}$
Hence, our final answers are: $\lt -1,-1 \gt$ and $\sqrt {2}$
