For angle bisector of angle ABC where A(1,0), B(2,-1), C(37, 34).
Direction BA: (1−2,0−(−1))=(−1,1), unit vector (−21,21)
Direction BC: (31,37), magnitude 352, unit vector (521,527)
Angle bisector direction (sum of unit vectors): (52−4,5212) → direction (−1,3)
Normal to bisector: (3,1). Bisector passes through B(2, -1):
3(x−2)+1(y+1)=0 → 3x+y−5=0
Therefore α=3, β=1, so α2+β2=9+1=10