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4x2 - 4x + 1 =0
faktorkan
(2x-1)^2 = 0
2x-1=0
2x=1
x=1/2
Kita sederhanakan persamaan kuadrat tersebut.
x² - x + 1/4 = 0
____________ × 4
4x² - 4x + 1 = 0
kita faktorkan.
( 2x - 1 ) ( 2x - 1 )
x.1 = x.2
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