ile to jest x = (2(piewiastek) z 5 - 3) do kwadratu - (3 (pierwiaski) z 5 - 4)(3 (pierwiastki) z 5 + 4)+ 12 (pierwiaastków) z 5 +20
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x = (2V5 -3)^2 - (3V5-4)(3V5+4) +12V5 + 20
x = 20 - 12V5 + 9 -(45-16) + 12V5 + 20
x = 49 - 29
x = 20
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