Chapter 10 - Section 10.4 - Introduction to Factoring Polynomials - Exercise Set - Page 722: 12

$b^4$

$b^6=\underline b\times\underline b\times\underline b\times\underline b\times b\times b$ $b^6=\underline b\times\underline b\times\underline b\times\underline b\times b\times b$ $b^4=\underline b\times\underline b\times\underline b\times\underline b$ $GCF=\underline b\times\underline b\times\underline b\times\underline b=b^4$