Question Number 12998 by 1630321995 last updated on 10/May/17
$$\frac{{a}\:\underset{−} {+}\sqrt{\mathrm{2}{a}.\mathrm{1}.\mathrm{1}}}{\mathrm{2}} \\ $$
Answered by Joel577 last updated on 10/May/17
$$\frac{{a}\:\pm\:\sqrt{\mathrm{2}{a}}}{\mathrm{2}}\: \\ $$