Question Number 9698 by rahulrai441992@gmail.com last updated on 26/Dec/16
$${a}^{\mathrm{2}} +{ab}+{b}^{\mathrm{2}} \\ $$
Answered by geovane10math last updated on 26/Dec/16
$${a}^{\mathrm{2}} \:+\:{ab}\:+\:{b}^{\mathrm{2}} \:=\:{a}^{\mathrm{2}} \:+\:\mathrm{2}{ab}\:+\:{b}^{\mathrm{2}} \:−\:{ab}\:= \\ $$$$=\:\left({a}\:+\:{b}\right)^{\mathrm{2}} \:−\:{ab} \\ $$