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57.3301410A.5B.6C.11D.1621080A.6B.7C.8D.93.ABCB=67C=33ADABCCADA.40B.45C.59D.554A.B.C.D.55565A.115B.120C.125D.1306.ABC,DEBCBD=DE=EC,A.4B.5C.6D.76787ABCCDBEABACCDBEPA=50BPCA.150B.130C.120D.1008aab,1=50,2=60,3A.50B.60C.70D.809.DEFGABC.x+yA.110B.120C.160D.16591010.,AB,C,D,EA.90B.180C.360D.540.32411.,ABCD,CEACD,ABEA=118AEC.111212.ABCCAB=50,CBA=601+2.13.523456.14.810aaaaa.15.ADABCBEABCBAC40AFE.151616.30451.1730.18.O2-1=..66198ABCDOOA+OB+OC+OD.20(8)ABCDEBCABDEB=78C=60EDC.21.10PQAPBQA,P,QOA=28AOC=100QBOBQAP2210ABCAC=5BC=2AB.1ABC.2ABC.23.10ABCAABCACB=456BDCEACABBDCEH()BHC.24.10ABCADBC,AEBACBCE.(1)B=30C70,EAD2BC,2EAD=C-B.25.10ABCBDCDBPCPABCACB.1A=30DP.2AD+P..3301.MB=NDMBA=NDCABMCDNA.M=NB.AB=CDC.AM=CND.AMCN1232.ABCDEACBCADBEDBEDCCA.15B.20C.25D.303.CAB=DBAAC=BDA.BC=ADB.CO=ODC.C=DD.AOB=C+D4.ABCDEFA.AB=DEBC=EFA=DB.A=DC=FAC=EFC.A=DB=EC=FD.AB=DEBC=EFABC=DEF4565.BDCABCDBDA.2B.3C.4D.56.ADBCAPDABBPABCPCDPDPCA.PDPCB.PD=PCC.PDPCD.7.MPNPMQNMPMT=MPTQA.TQ=PQB.MQT=MQPC.QTN=90D.NQT=MQT7898.ABCDEAE=CEBE=DEA.AD=BCB.ADBCC.EAD=ECBD.ACDB9.AOBAOBA.SSSB.SASC.ASAD.AAS10.AEABAE=ABBCCDBC=CD,SA.50B.62C.65D.68.33011.20cm.1112131512.ACBDOOA=OCAEFCBE=FD.13.ABCADBCDCEABEADCEHAEHCEB.14.ABCC=90BC=16ADBACBCDDCDB=35DAB.15.ABCDEF.16.RtABCRtDEF,A=90B=25F=E=.17.ABCAB=6BC=5AC=4BACBCDABAE=AC,BDE.1718192018.ABBCCDBCBCAB=BCEBCAEBDFCD=4cm,AB.19.RtABCACB=90AC=4ABA90ABBAB.20.BDABCACDDEABE,DFBCF,AB=6BC=8.SABC=28DE=..6021.10ABCABC=90DBCBD=ABBBEACBDDEEDE+CD=AB.22.12ACBCADBDAD=BCADBCO.OC=OD.23.(12)AOBCODEFOAOBCE=CFDE=DFOE=OF.24.12ABCBDCEABCBDPBP=ACCEQCQ=ABAQAP.25.(14)1ABCDAB=ADBAD=120B=ADC=90.E,FBCCDEAF=60.BE,EF,FD.FDGDG=BE.AG,ABEADG,AEFAGF,2ABCDAB=AD,B+D=180.E,FBC,CDEAF=21BAD,..3301.5A.1B.2C.3D.4280A.20B.50C.60D.803.A.AB=CDABCDB.ABC.ABCDAB=CDD.4P70M402P40NNPA.40B.60C.70D.804565BACClAC60lPAPB=30A.3B.2C.1D.6.BOABCCOACBBO=COBOC=100BAO=A.10B.20C.30D.407.50,A.50B.65C.80D.50808.RtABCACB90B30CDABAD=3cmABA.3cmB.6cmC.9cmD.12cm89109.ABCIBICABC,ACBIDEBC,ABDACEDBIACIAIBAC;ADEAB+AC.A.B.C.D.10.1A1BCB=30,A1B=CB,A1BDCA1A2A1A2A1D,2A1A2D;A2DEA1A2A3A2A3A2E,3A2A3E,nAn.32411..11141512.P3-1yQa+b,1-bab.13.ABCA=90BDDEBCEEBCABC=.14.12CFAD,CEAB,CD=CB,ADC+CBA.15.ABC19cmACDEBCDEAE=3cmABD.16.RtABCC=90A=30BDAC=6cmAD.16171817...18.ADABCADC=45ADCADCCBCCC..6619.10ABCA(-2,5)B-4,3C(-11).1ABC5A1B1C1;(2)ABCxA2B2C2C2.20.10ABCABACBCDEBCDACEAC=8cmABE14cmAB.21.10ABC1=2=3DEF.22.10ABCAB=ACECAAEF=AFE.EFBC.23.12PABCBP=CPDCP=ACPDC=BC.D=12A.24.14RtABCAB=ACBAC=90OBC.1OABCABC2MNABACAN=BMOMN..3301.3a2bA.3abB.6aC.6abD.5ab2.A.3a+2a=a5B.a2a3=a6C.(a+b)(a-b)=a2-b2D.(a+b)2=a2+b23.-a5-a2-a6(-a3);(-a2)3a32;-(-a)25-a10A.B.C.D.4.x+y2-(x-y)24xyA.4yxB.4yxC.1D.2xy5.100x2+kx+49kA.70B.140C.14D.49006.A.-x2+2xy-y2B.x4-2x3y+x2y2C.(x2-3)2-2(3-x2)+1D.x2-xy+12y27.3x=4,9y=7,3x-2yA.74B.47C.-3D.728.x+mx2-3x+nx2xmnA.m=3,n=1B.m=3,n=-9C.m=3,n=9D.m=-3,n=99.abca-c2-b2A.B.C.D.010.a+1cma-1cma1A.2cm2B.2acm2C.4acm2D.(a2-1)cm2.32411.x-40=1x.12.13520165322015=.13.x2-6x2y+9x2y2=.14.x2+y2=10,xy=3,x+y=.15.10m=5,10n=7,102m+n=.16.x+x1=2,x2+21x=.17.4a2-4b2,a+b.18.9-1=8,16-4=12,25-9=1636-16=2010n(n1)..6619.1220.12(1)m3n-9mn;2x2+42-16x2;3x2-4y2-x+2y;44x3y+4x2y2+xy3.21.81x2-4xy+4y2x-2y-4x2-9y22x-3y,x=-4,y=5122x-y=10x2+y2-x-y2+2yx-y4y.22.8x(x+1)2-x(x2-3)-2(x+1)(x-1)=20.23.(8)aa-1-(a2-b)=-5,222ba-ab.24.8a,ba+b=16,ab=60.25.10100100cm99cm98cm1cm.(330)1.,A.2B.3C.4D.52.yxyx3.A.-20=1B.2x-2=22xC.3.210-3=0.0032D.(x2y-2(x-1y3)=xy4.ba11=21,baabA.21B.-21C.2D.-25.12xxx=1A.2x+1)-x2=1B.2(x+1)+x2=1C.2(x+1)-x2=x(x+1)D.2x-(x+1)=x(x+1)6.v20100=v2060A.v=20B.v=25C.v=-5D.v=5A.A=4,B=-9B.A=7,B=1C.A=1,B=7D.A=-35,B=139.x22xmx=3mA.m-6B.m-6C.m-6m-4D.m-410..241000550.x.32411.(x+2)0-123xx.12.0.00000345-2.0110-5.13.aba0+b-2-1=.14.)2)(1(1||xxxx=.15.xmxx223m=.16.x=,12xxxx11.17.240200.4..18.x+x2=3x+x6=5x+x12=7(x+x21=1+2x=1x=2x+x32=2+3x=2x=3x+x43=3+4x=3x=4.)xx+n2+nx-3=2n+4n..6619.1220.(6(2)xx0,1,2.22.82.xy.1x1yx.1x,y223.(10)a,x?24.(10)20155605025.1220152015A,B6600AB2600.1A,B226A60B40AB.3301.2.AnAA.(90n)B.(180n)C.(270n)D.(90+n)3.A.45B.60C.75D.903454.ABCDADBCACBDOAEBDECFBDFA.3B.5C.6D.75.DABBCDEACCEAB=8m,A=30DEA.1mB.2mC.3mD.4m6..A.B.C.D.7.ADABCEFADADDE=DFBFCE.CE=BFABDACDBFCEBDFCDEA.1B.2C.3D.47898.ABCABBCABDE,AE=3cmADC9cmABCA.10cmB.12cmC.15cmD.17cm9.EABABCDA90DAFEFA.EABFADB.AEAFC.AEF=45D.AECFABCD10.A.B.ABCADAC.60D..32411.A+B+C+D+E=.12.-221x.13.30.1416171814.ABC=DEFAB=DEABCDEFSAS.15.ABCDEFA=60F=90DE=6cmAC=cm.16.ABBAB9050C50DD90DE17EACEAB.17.A(-34)B(54)xPPA+PBP.18.ABCA01C43ABDABCD..6619.10ABC24cmab=34c=2b-aABC.20.(10)ABCA13B(4,2)C(21).ABCxA1B1C1A1B1C1.21.(10),ABC,DEABACAD=AEDEBCABC.22.10ABCAB=ACBAC=120PBCBAP=90PC=4cmPB.23.(12)AD,ADABCABCBC,BCAB=ABAD=ADABCABC.24.14DABCCAD=CBD=15EAD,CE=CA.(1)DEBDC;(2)MDEDC=DMME=BD..3301.A.-p2q3=-p5q3B.12a2b3c6ab2=2abC.3m23m-1=m-3m2D.(x2-4x)x-1=x-42.x3.0.000072mm0.000072A.7.2105B.-7.2105C.7.210-5D.-7.210-54.