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x-1=x^2-3x+2
x^2-4x+3=0
a=1 b=-4 c= 3
D=b^2-4ac
=(-4)^2-4(1)(3)
=16-12
=4
L=(DvD)/6a^2
=(4v4)/6
=8/6
=4/3 sl
ket ^=pangkat
v=akar