Odpowiedzi

2013-07-19T13:59:04+02:00

x + (1 + x)*√5 = 1

x + √5 + √5*x = 1

x(1 + √5) = 1 - √5   /:(1+√5

x = (1-√5)/(1+√5) * (1-√5/(1-√5)

x = (1-√5)²/(1-5)

x = (1 - 2√5 + 5)/(-4)

x = -(6 - 2√5)/(-4)

x = (√5 - 3)/2