# How do you find the roots, real and imaginary, of y= x^2 -3x +7  using the quadratic formula?

${x}_{1 , 2} = \frac{- b \pm \sqrt{{b}^{2} - 4 a c}}{2 a}$
a= 1; b=-3; c=7
If $\sqrt{{b}^{2} - 2 a c} < 0$ then you have an imaginary number.