# Chapter 5 - Polynomials and Factoring - 5.4 Factoring Perfect-Square Trinomials and Differences of Squares - 5.4 Exercise Set: 91

$2(3t+2s)(3t-2s)$

#### Work Step by Step

Factoring the $GCF= 2$, the given expression, $18t^2-8s^2 ,$ is equivalent to \begin{array}{l} 2(9t^2-4s^2) .\end{array} Using $x^2-y^2=(x+y)(x-y)$ or the factoring of the difference of 2 squares, then the factored form of the expression, $2(9t^2-4s^2) ,$ is \begin{array}{l} 2(3t+2s)(3t-2s) .\end{array}

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.