# How do you find the roots, real and imaginary, of y= x^2 - 2x-121  using the quadratic formula?

Jan 3, 2016

$\textcolor{b r o w n}{\left\{{x}_{1} , {x}_{2}\right\} \to \left\{41 , - 39\right\}}$
Factorising gives: $y = \left(x - 41\right) \left(x + 39\right)$
Thus the roots are: $\textcolor{b r o w n}{\left\{{x}_{1} , {x}_{2}\right\} \to \left\{41 , - 39\right\}}$