Question Number 110318 by Study last updated on 28/Aug/20
$$\left({a}+{b}−{c}\right)^{\mathrm{2}} =?? \\ $$
Answered by john santu last updated on 28/Aug/20
$$={a}^{\mathrm{2}} +{b}^{\mathrm{2}} +{c}^{\mathrm{2}} +\mathrm{2}{ab}−\mathrm{2}{ac}−\mathrm{2}{bc} \\ $$