Solve the quadratic equation by completing the square. $\displaystyle {4}{r}^{{2}}+{r}+{2}={0}$.

Entry Tip: to type $\displaystyle \frac{{4}}{{3}}\pm\frac{{{i}\sqrt{{{7}}}}}{{3}}$ Type "4/3+-(isqrt(7))/3" be careful with parenthesis and use the preview button!
The $\displaystyle {i}$ can be entered before or after the square root.

If you use the math palette, once you save your answer, make sure it shows +- in the cell.
If the answer cell shows "pm" change to +- using the keyboard.