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1、一元二次方程百题一、用直接开平方法解下列一元二次方程。（1）（2）（3）（4）（5）；（6）；（7）．（8）．（9） （10）（11）； （12）（13）（14）； （15）二、用配方法解下列一元二次方程。（16）（17）（18）toliftconstruction.3,constructionofroadpavementarenecessary,cleanandfreeofwater,drainagefacilitiesingoodcondition,smoothdrainage.4,F
2、engShuipipeline,communicationfacilities,constructionlightinglayoutreasonable,markclear.5,pointparkconstructionmachineryandequipment,materials,toolsplacedinanorderlymanner,workisfinished,andvehicleappearancelooksclean,fire-fightingequipmentavailable,u
3、nobstructed.6,theconstructionofvarioustypesofscaffolding,channel,ladder,guardrails,safetynetsandothersecurityprotectionfacilitiestoimprovereliability,securityIDvisible.7,activelycarryoutdust,toxicity,noisecontrolandarrangetogiveupballastwater.8,livin
4、gquartersclean,beautifulenvironment.Constructionsafetyplan15.215.2.1safetyguidelinesthesafetyapproach:people-oriented,fullparticipation,buildasafetyculture,anddynamic.15.2.2safetygoalourcompanyattachesspecialimportancetothisproject,thepromotionofcomp
5、rehensivesecurityinthemanagement,constructionmanagement,realization:nopersonaldeathbyaccident;Nomajorconstructionmachineryandequipmentdamageaccidents;Nomajorfireaccidents;Notprimarilyresponsiblefortheoccurrenceofmajoraccidents;Nomajorcollapseandrooff
6、all,oftheaccident;Noenvironmentalpollutionaccidentandoccupationalhealthinjuries,foodpoisoningincidents.Controltheseriousinjuryaccidentrateislessthan11（19）（20）（21）（22）（23）（24）．（25）．（26）．（27）．（28）．（29）（30）（31） （32）． （33）toliftconstruction.3,construct
7、ionofroadpavementarenecessary,cleanandfreeofwater,drainagefacilitiesingoodcondition,smoothdrainage.4,FengShuipipeline,communicationfacilities,constructionlightinglayoutreasonable,markclear.5,pointparkconstructionmachineryandequipment,materials,toolsp
8、lacedinanorderlymanner,workisfinished,andvehicleappearancelooksclean,fire-fightingequipmentavailable,unobstructed.6,theconstructionofvarioustypesofscaffolding,channel,ladder,guardrails,safetynetsandothersecurityprotectionfacilitiestoimprovereliabilit
