Сократите дробь \[15-2b-b^2/(b^2+7b+10).\] \[(3-b)/(b+2)\] \[(3-b)/(2-b)\] \[(b-3)/(b+2)\] \[(b-3)/(2-b)\]

Задание

Сократите дробь

\[15-2b-b^2/(b^2+7b+10).\]

\[(3-b)/(b+2)\]
\[(3-b)/(2-b)\]
\[(b-3)/(b+2)\]
\[(b-3)/(2-b)\]