# Chapter 6 - Section 6.1 - The Greatest Common Factor - Practice: 2

$a.$ $y^{4}$ $b.$ $x$

#### Work Step by Step

a. Since they are all the same variable, it would be the smallest exponent to which y is raised, or 4; hence, $y^{4}$. b. The GCF is $x^{1}$ or $x$, since $1$ is the smallest exponent raise to $x$.

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