himpunan penyelesaian 1/2log (x2-4x+5) =1 adalah

misal:
²log8 =3 artinya 2³ = 8, sehingga:
^(1/2)log(x²-4x+5) = 1
x²-4x+5 = (1/2)^1
x²-4x+5 = 1/2
x²-4x+5-1/2 =0
x²-4x+(9/2) = 0
(x-2)² - 4 + (9/2) = 0
(x-2)² + 1/2 = 0
(x-2)² = -1/2
(x-2) = +-√(-1/2) akarnya imaginer (i)
sehingga:
x1 = 2+ √(-1/2)
x2 = 2- √(-1/2)

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