# How do you factor x^2-144?

Using the identity ${a}^{2} - {b}^{2} = \left(a - b\right) \left(a + b\right)$ we get:
${x}^{2} - 144 = {x}^{2} - {12}^{2} = \left(x - 12\right) \left(x + 12\right)$