Solve by completing the square. Be sure to simplify your answers if possible.

$\displaystyle {2}{x}^{{2}}-{3}{x}-{1}={0}$

If you have two irrational solutions, type $\displaystyle \frac{{3}}{{5}}\pm\frac{{{2}\sqrt{{{3}}}}}{{5}}$ as "3/5+-(2sqrt(3))/5"



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.

$\displaystyle {x}=$Preview Question 6