Answer:
The magnitude or length of a vector QR with points Q(x2, y2) and R(x1, y1) can be calculated using the formula:
|QR| = sqrt((x2 - x1)^2 + (y2 - y1)^2)
Using the given points, we have:
Q = (3, 4), R = (-2, 5)
So,
|QR| = sqrt((3 - (-2))^2 + (4 - 5)^2)
= sqrt(5^2 + (-1)^2)
= sqrt(26)
Therefore, the exact magnitude of vector QR is sqrt(26).