Разделите многочлен \(\displaystyle v^{\,3}-7v^{\,2}+90\) на многочлен \(\displaystyle v+3\) в столбик:

\(\displaystyle -\)	\(\displaystyle \phantom{\,\,}v^{\,3}-7v^{\,2}+90\)				\(\displaystyle v+3\)
	[ ]				[ ]
	\(\displaystyle -\)	[ ]
		[ ]
		\(\displaystyle \phantom{ xxx} -\)		[ ]
				[ ]
				\(\displaystyle 0\)

и запишите разложение:

\(\displaystyle v^{\,3}-7v^{\,2}+90=(v+3)\cdot \big(\)[ ]\(\displaystyle \big).\)