In 8–11, write the given higher-order equation or system in an equivalent normal form (compare Section 5.3).

Math1310 Section3.1:Functions‐BasicIdeas Therestofthiscoursedealswithfunctions. Definition:Afunction,f,isarulethatassignstoeachelementxinasetAexactlyoneelements, calledf(x),inasetB. Functionsaresoimportantthatweuseaspecialnotationwhenworkingwiththem.We’llwrite f(x)todenotethevalueoffunctionfatx.Wereadthisas“fofx.”Wecanuselettersotherthanfto denoteafunction,soyoumayseeafunctionsuchasg(x),h(x)orP(x). Definition:ThesetAiscalledthedomainandisthesetofallvalidinputsforthefunction. Definition:ThesetBiscalledtherangeandisthe