Answer
$\lt -17,32 \gt$ and $\sqrt {1313}$
Work Step by Step
The magnitude of a vector can be calculated as:
$|v|=\sqrt{v_1^2+v_2^2}$
Now, $3u -4v=3\lt -3,4 \gt -4 \lt 2,-5 \gt =\lt -17,32 \gt$
and $|\lt -17,32\gt|=\sqrt{(-17)^2+(32)^2}=\sqrt {1313}$
