TMEtienne TMEtienne flag user Question: 9x^2-81 9x^2-81 – TMEtienne Tag Algebra 2 english Asked About: Pg. 328, Algebra 2 abdo flag user ? abdo 1yr 9x^2-81=(3x)^2-9^2=(3x-9)(3x+9) 9x^2-81=(3x)^2-9^2=(3x-9)(3x+9) 0 Comments Your Name Here Answer this question: