hafaliad cwadratig

== Welsh == === Noun === hafaliad cwadratig m (plural hafaliadau cwadratig, not mutable) (algebra) quadratic equation === References === Delyth Prys; J.P.M. Jones; Owain Davies; Gruffudd Prys (2006), Y Termiadur: termau wedi'u safoni; standardised terminology‎[1] (in Welsh), Cardiff: Awdurdod cymwysterau, cwricwlwm ac asesu Cymru (Qualifications curriculum & assessment authority for Wales), →ISBN