Find the product
(
b
−
1
)
(
b
8
+
b
7
+
b
6
+
b
5
+
b
4
+
b
3
+
b
2
+
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)}
(
b
−
1
)
(
b
8
+
b
7
+
b
6
+
b
5
+
b
4
+
b
3
+
b
2
+
b
+
1
)
Ans =
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\displaystyle
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