${3}^{2}{x}^{2}-121$
Write the number in the exponential form with an exponent of $2$${3}^{2}{x}^{2}-{11}^{2}$
Multiply the terms with equal exponents by multiplying their bases${\left( 3x \right)}^{2}-{11}^{2}$
Use ${a}^{2}-{b}^{2}=\left( a-b \right)\left( a+b \right)$ to factor the expression$\left( 3x-11 \right) \times \left( 3x+11 \right)$