Разделите многочлен \(\displaystyle s^{\,2}+11s+28\) на многочлен \(\displaystyle s+7\) в столбик:

\(\displaystyle -\)	\(\displaystyle \phantom{\,\,} s^{\,2}+11s+28\)				\(\displaystyle s+7\)
	[ ]				[ ]
	\(\displaystyle \phantom{ x^{\,2}+} -\)	[ ]
		[ ]
		\(\displaystyle 0\phantom{ xx}\)

и запишите разложение:

\(\displaystyle s^{\,2}+11s+28=(s+7)\cdot \big(\)[ ]\(\displaystyle \big){\small . }\)