We achieve the general solution and the generalized Hyers-Ulam-Rassias and Ulam-Gavruta-Rassias stabilities for quadratic functional equations where are nonzero fixed integers with , and for fixed integers with and .
"On the Generalized Hyers-Ulam-Rassias Stability of Quadratic Functional Equations." Abstr. Appl. Anal. 2009 1 - 11, 2009. https://doi.org/10.1155/2009/923476