2022-2023学年江苏省宝应县数学八年级上册期末考试模拟试题含解析

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2022-2023
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E]ABCᐵxYḄ]AiBiG᝞(2)C(2,-4),ᡠᐵxYḄxᙶ᪗{1|ᦪ#,GḄᙶ᪗(2,4)a(3)ᑭᵨᳮᑖHEAB=Vl2+32=y/10,AC=y/l2+22=y[5,BC=G+&=6ᡠ]ABCḄᕜ=+6+J=26+.ூ,e௃f⚪ὃhḄX}-Y{ᣚ#YḄឋᔠᳮᑖ᪆Xt⚪Ḅᐵk.325ஹ(1)45஺8,x2-7xi(2)7x(x+2)(x—2),y(x—y)~a(3)¡=4,x———ூᑖ᪆௃(1)᪷w᦮¤Ḅ¥ᔠM¦§ᑣ¨¦ᓽ:((2)᪷w©ª¤§6ª¤§¤ᑖ((3)ᐜ¬ᑖ¤Pᓄ᦮¤PHExḄI#®ᐭᨬqªᑖ±²³ᓽ:.

19ூ&௃:(1)5a2•(~3a3)2=5a2-9a6=45«8,(x—3)(x+2)-6(x-1)—x~—3x+2x-6—6x+6-x~—7x,(2)7x3-28x=7x(x2-4)=7x(x+2)(x-2),Yy—2xy2+y}=y(x2-2µ+/)=y*/¸¹(Pº[»79x(x+2);2(x+2)=3x,¼½¾ஹ¿⚗;2x-3x=-4,;x=4,)²³#x=4XÁPḄ#ᡠx=4,---^-=1x-2r/4Pº[»79Ï2/4;X(X+2)-1=X2-4,¼½¾ஹ¿⚗;x2-x2+2x=-4+l/3;x=--,23)²³#Â=/=XÁPḄ#2ᡠx=—g.2ூ,e௃f⚪ÃᔠὃhÄ᦮¤Ḅ¥ᔠM¦ஹ¤ᑖ6ᑖ¤PḄ§#⌕Ædᑖ¤PHb⌕³᪷.4+ஹÇ26ஹ(1)4a2+4ab-3b2a(2)4x2+4xy+y2-4x-2y-1a(3)------j(4)-2m-6,,2-5ூᑖ᪆௃(1)ᑭᵨR⚗¤9R⚗¤ÈÉ#ᯠbᔠÊᓽ:((2)ᑭᵨËᐰª¤¨¦((3)ᐜ¨¦EF-4",ᯠb¨¦ᦪ¤ḄI((4)ᐜ¬½¾ᑁÍᑖ#®¬ᑖÎᑖ±¤ᑖbÏᑖ;ᑮÁ¤=-26,ᯠb¬஻?ḄIᐭ¨¦ᓽ:.

20ூ2௃(1)#=4/-2"+6Õ-362=4a*2+4ab-3b2;(2)#=(2x+y)2-2(2x+y)-1=4x2+4xy+y2-4x-2y-i,(3)fe2-4tzc=(-8)2-4x2x5=24,-b+\/b2-4ac8+2A/64+72a2x2-2ï~(Ú+2)(6—2)—52(/?7—2)(4)#Q--------------4------—Im—2/n—3(tn+3)(/n-3)2(/%-2)tn—2m—3=—2(஻?+3)=—2m—6>ÙÚ=—Û#=-2x(—)—6=—5.22ூHI௃Ü⚪ὃM%⚗ÞßஹᑖḄᓄáâãᦪâ.äå᦮ÞßᑖçßᑣèéçP⚪ᐵV.