Заполни пропуски

а) \((a\,+\) [ ] \()^2=\) [ ] \(+\) [ ] \(+\,b^2\) ;

б) \((2y\,+\) [ ] \()^2=\) [ ] \(+\,4y\,+\) [ ];

в) \((\) [ ] \(-\) [ ] \()^2=p^2-\) [ ] \(+\,4q^2\) ;

г) \((\) [ ] \(-\) [ ] \()^2=4x^2-12xy+\) [ ].