## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$84=2^2\cdot3\cdot7$
Repeatedly factoring the smallest prime factor from the composite factor, the factors of $84$ are \begin{array}{l}\require{cancel} 84=2(42) \\\\ 84=2(2)(21) \\\\ 84=2(2)(3)(7) .\end{array} Hence, the prime factorization of $84$ is $84=2^2\cdot3\cdot7 .$