Write a function that implements the quadratic equation. Given three inputs $(a,b,$andc$),$ calculate the roots $(r$

$r=\frac{-b+-\sqrt[\phantom{2}]{b^2-4ac}}{2a}$

Name your function Quad.

Function $0$

$\%$ Variables

$\%$ Inputs

$\%$ a $($first input argument$)$

$\%$ b $($second input argument$)$

$\%$ c $($third input argument$)$

$\%$ Outputs

$\%$ positive root $($first output argument$)$

$\%$ negative root $($second output argument$)$