Question

Solve the equation $x^2-x-1=0$

Answer 1

$x^2-x-1=0$

Here $a=1,b=-1,c=-1$

$\Rightarrow x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

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

$\Rightarrow x=\frac{1\pm \sqrt{5}}{2}$