Find the product
(b1)(b8+b7+b6+b5+b4+b3+b2+b+1)\displaystyle {\left({b}-{1}\right)}{\left({b}^{{8}}+{b}^{{7}}+{b}^{{6}}+{b}^{{5}}+{b}^{{4}}+{b}^{{3}}+{b}^{{2}}+{b}+{1}\right)}


Ans =