Question

What are the solutions to x^2-2x-1=0? Round to the nearest hundredth if necessary.

Answer 1

have you covered factoring of quadratics yet?

Answer 2

Yes

Answer 3

hmmm this one doesn't seem to factor out nicely... thus you may end up using the quadratic formula thus \(\bf x^2-2x-1=0\implies y={\color{blue}{ 1}}x^2{\color{red}{-2}}x{\color{green}{ -1}}\\
\textit{quadratic formula}\\

\qquad \qquad
x= \cfrac{ - {\color{red}{ b}} \pm \sqrt { {\color{red}{ b}}^2 -4{\color{blue}{ a}}{\color{green}{ c}}}}{2{\color{blue}{ a}}}\)