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__________________:5
= x^2 -6x +5 = 0
dengan cara melengkapkan kuadrat sempurna, maka:
(x-3)^2 -9+5 = 0
(x-3)^2 = 4
x-3 = -2 atau 2
jika
x-3 = -2 ,maka x= 1
jika
x-3 =2,maka x=5
x = {1,5}