Question

va rog puteti sami dati urgent raspunsul la ecuatia data X^2-x-1=0

Answer 1

$x^{2} -x-1=0$

$x= \frac{-(-1)+- \sqrt{(-1)^2-4*1*(-1)} }{2*1}$

$x = \frac{1+- \sqrt{1+4} }{2}$

$x= \frac{1+- \sqrt{5} }{2}$

$x= \frac{1+ \sqrt{5} }{2}$

$x= \frac{1- \sqrt{5} }{2}$

$x_{1} = \frac{1- \sqrt{5} }{2}$

$x_{2} = \frac{1+ \sqrt{5} }{2}$

Answer 2

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