jika 1-4/x+4/x^2=0 maka 2/x^2

1-[tex] \frac{4}{X} [/tex]+[tex] \frac{4}{X kuadrat} [/tex] = 0   --> kali kan dengan x²
x²-4x+4=0
(x-2)(x-2)=0
x=2 
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nilai [tex] \frac{2}{x kuadrat} [/tex]
  = 2/(2)²
  = 2 / 4 
  = 1/2