2017-03-19

( 1) \(ma+mb-mc=m(a+b-c)\)( 2) \({a}^{2}+2ab+{b}^{2}={(a+b)}^{2}\)( 3) \({a}^{2}-2ab+{b}^{2}={(a-b)}^{2}\)( 4) \({a}^{2}...