tolong di jawab ..........

1/2 log (x^2-4x+5) = -1
1/2 log (x^2-4x+5) = 1/2 log (1/2)^-1
x^2-4x+5 = 2
x^2-4x+5-2 = 0
x^2-4x+3 = 0
(x-3)(x-1)

x-3 = 0 x-1 = 0
x = 3 x= 1

Hp {3,1}