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1、平方差公式和完全平方差公式和完全平方公式習(xí)題課平方公式習(xí)題課復(fù)習(xí)提問:復(fù)習(xí)提問:把平方差公式用字母表示把平方差公式用字母表示出來出來把完全平方公式用字母表把完全平方公式用字母表示出來示出來1、利用公式進行計算:、利用公式進行計算:22(1)(2 )(2 )(2)(2 )( 2)(3)(23 )(4)( 2)xy xyabbaabxy2、化簡求值:、化簡求值:22213)(1)(2),1(2)()()() 213,3xxxxa ba b a bbab()(其中其中3、在橫線上添上適當(dāng)?shù)拇鷶?shù)式,使、在橫線上添上適當(dāng)?shù)拇鷶?shù)式,使等式成立等式成立22222222(1)()_(2)()_(3)()()_

2、abababababab4.公式變形的應(yīng)用:公式變形的應(yīng)用:2222221,2,_29,8,_)25,()16,_abababxyxyxyxyxyxy (1)已知 則。( )已知則。(3)已知(則。2222416_2425_12,_.(4)41xaxaxkxyykxxmmx(1)已知,是完全平方式,則。( )已知,是完全平方式,則。(3)是完全平方式 則請把添加一項后是完全平方式,可以添加_.5.完全平方式完全平方式22,+4825x yxyxy證明:不論是什么有理數(shù),多項式的值總是正數(shù)。并求出它的最小值。6.7.計算:計算:2(1)()(2)()()(3)()()abcabc abcabc

3、abc思考題:思考題:243212222)()()()().(1xxxxedcbadcbacbaba5#Mxi4ZKwh3YJvg2XIuf1WHte0VGsd+UFrc-TEqb)SDpa(RCo9*QBn8&PAm7$Ozl6*QBn8&PAm7%Ozl6$Nyk5!Mxj4#Lwi3ZKvh2YJug1XItf0WHse+VGrd-TFqc)SEpb(RDoa*QCn9&PBm8%OAl7$Nzk6!Myj5#Lxi4ZKwh3YJvg1XIuf0WHte+VGsd-UFrc)TEqb(SDpa*RCo9&QBn8%PAm7$Ozl6!Nyj5#Mxi4Z

4、Lwh3YKvg2XJuf1WIte0VHsd+UGrc-TFqb)SEpa(RDo9*QBn8&PAm7%Ozl6$Nyk5!Mxj4#Lwi3ZKvh2YJug1XItf0WHse+VGrd-TFqc)SEpb(RDoa*QCn9&PBm8%OAl7$Nzk6!Myj5#Lxi4ZKwh3YJvg2XIuf0WHte+VGsd-UFrc)TEqb(SDpa*RCo9&QBn8%PAm7$Ozl6!Nyk5#Mxi4ZLwh3YKvg2XJuf1WIte0VHsd+UGrc-TFqb)SEpa(RDo9*QCn8&PAm7%Ozl6$Nyk5!Mxj4#Lwi

5、3ZKvh2YJug1XItf0WHse+VGrd-UFqc)SEpb(RDoa*QCn9&PBm8%OAl7$Nzk6!Myj5#Lxi4ZKwh3YJvg2XIuf0WHte+VGsd-UFrc)TEqb(SDpa*RCo9&QBn8%PAm7$Ozl6!Nyk5#Mxi4ZLwh3YKvg2XJuf1WIte0VHsd+UGrc-TFqb)SEpa(RDo9*QCn8&PAm7%Ozl6$Nyk5!Mxj4#Lwi3ZKvh2YJug1XItf0WHse+VGrd-UFqc)TEpb(RDoa*QCn9&PBm8%OAl7$Nzk6!Myj5#Lxi4ZK

6、wh3YJvg2XIuf1WHte+VGsd-UFrc)TEqb(SDpa*RCo9&QBn8%PAm7$Ozl6!Nyk5#Mxj4ZLwh3YKvg2XJuf1WIte0VHsd+UGrc-TFqb)SEpa(RDo9*QCn8&PBm7%Ozl6$Nyk5!Mxj4#Lwi3ZKvh2YJug1XItf0WHse+VGrd-UFqc)TEpb(RDoa*QCn9&PBm8%OAl7$Nzk6!Myj5#Lxi4ZKwh3YJvg2XIuf1WHte+VGsd-UFrc)TEqb(SDpa*RCo9&QBn8%PAm7$Ozl6!Nyk5#Mxj4ZLwh3

7、YKvg2XJuf1WIte0VHsd+UGrc-TFqb)SEpa(RDo9*QCn8&PBm7%OAl6$Nyk5!Mxj4#Lwi3ZKvh2YJug1XItf0WHse+VGrd-UFqc)TEpb(SDoa*QCn9&PBm8%OAl7$Nzk6!Myj5#Lxi4ZKwh3YJvg2XIuf1WHte0VGsd-UFrc)TEqb(SDpa*RCo9&QBn8%PAm7$Ozl6!Nyk5#Mxj4ZLwi3YKvg2XJuf1WIte0VHsd+UGrc-TFqb)SEpa(RDo9*QCn8&PBm7%OAl6$Nyk5!Mxj7%OAl6$Nz

8、k5!Myj4#Lxi3ZKwh2YJvg1XIuf0WHte+VGsd-UFrc)TEpb(SDoa*RCn9&QBm8%PAl7$Ozk6!Nyj5#Mxi4ZLwh3YKvg2XJuf1WHte0VGsd+UFrc-TEqb)SDpa(RCo9*QBn8&PAm7%Ozl6$Nyk5!Mxj4ZLwi3YKvh2XJug1WItf0VHse+UGrd-TFqc)SEpb(RDoa*QCn9&PBm7%OAl6$Nzk5!Myj4#Lxi3ZKwh2YJvg1XIuf0WHte+VGsd-UFrc)TEpb(SDoa*RCn9&QBm8%PAl7$Ozk6!

9、Nyj5#Mxi4ZLwh3YKvg2XJuf1WIte0VGsd+UFrc-TEqb)SDpa(RCo9*QBn8&PAm7%Ozl6$Nyk5!Mxj4#Lwi3YKvh2XJug1WItf0VHse+UGrd-TFqc)SEpb(RDoa*QCn9&PBm8%OAl6$Nzk5!Myj4#Lxi3ZKwh2YJvg1XIuf0WHte+VGsd-UFrc)TEqb(SDoa*RCn9&QBm8%PAl7$Ozk6!Nyj5#Mxi4ZLwh3YKvg2XJuf1WIte0VGsd+UFrc-TEqb)SDpa(RCo9*QBn8&PAm7%Ozl6$Nyk

10、5!Mxj4#Lwi3YKvh2XJug1WItf0VHse+UGrd-TFqc)SEpb(RDoa*QCn9&PBm8%OAl6$Nzk5!Myj4#Lxi3ZKwh2YJvg1XIuf0WHte+VGsd-UFrc)TEqb(SDpa*RCn9&QBm8%PAl7$Ozk6!Nyj5#Mxi4ZLwh3YKvg2XJuf1WIte0VHsd+UFrc-TEqb)SDpa(RCo9*QBn8&PAm7%Ozl6$Nyk8&PBm7%OAl6$Nzk5!Mxj4#Lwi3ZKvh2YJug1XItf0WHse+VGrd-UFqc)TEpb(SDoa*RCn9&a

11、mp;PBm8%OAl7$Nzk6!Myj5#Lxi4ZKwh3YJvg2XIuf1WHte0VGsd+UFrc-TEqb(SDpa*RCo9&QBn8%PAm7$Ozl6!Nyk5#Mxj4ZLwi3YKvh2XJug1WIte0VHsd+UGrc-TFqb)SEpa(RDo9*QCn8&PBm7%OAl6$Nzk5!Myj4#Lwi3ZKvh2YJug1XItf0WHse+VGrd-UFqc)TEpb(SDoa*RCn9&QBm8%OAl7$Nzk6!Myj5#Lxi4ZKwh3YJvg2XIuf1WHte0VGsd+UFrc-TEqb(SDpa*RCo9&

12、QBn8%PAm7$Ozl6!Nyk5#Mxj4ZLwi3YKvh2XJug1WIte0VHsd+UGrc-TFqb)SEpa(RDo9*QCn8&PBm7%OAl6$Nzk5!Myj4#Lxi3ZKvh2YJug1XItf0WHse+VGrd-UFqc)TEpb(SDoa*RCn9&QBm8%PAl7$Nzk6!Myj5#Lxi4ZKwh3YJvg2XIuf1WHte0VGsd+UFrc-TEqb)SDpa*RCo9&QBn8%PAm7$Ozl6!Nyk5#Mxj4ZLwi3YKvh2XJug1WItf0VHsd+UGrc-TFqb)SEpa(RDo9*QCn8&am

13、p;PBm7%OAl6$Nzk5!Myj4#Lxi3ZKvh2YJug1XItf0WHse+VGrd-UFqc)TEpb(SDoa*RCn9&QBm8%PAl7$Nzk6!Myj5#Lxi4ZKwh3YJvg2XIuf1WHte0VGsd+UFrc-TEqb)SDpa*RCrc-TEqb)SDpa(RCo9*QBn8&PAm7%Ozl6$Nyk5!Mxj4#Lwi3ZKvh2YJug1WItf0VHse+UGrd-TFqc)SEpb(RDoa*QCn9&PBm8%OAl7$Nzk6!Myj4#Lxi3ZKwh2YJvg1XIuf0WHte+VGsd-UFrc)TEqb(

14、SDpa*RCo9&QBm8%PAl7$Ozk6!Nyj5#Mxi4ZLwh3YKvg2XJuf1WIte0VHsd+UGrc-TEqb)SDpa(RCo9*QBn8&PAm7%Ozl6$Nyk5!Mxj4#Lwi3ZKvh2YJug1XItf0VHse+UGrd-TFqc)SEpb(RDoa*QCn9&PBm8%OAl7$Nzk6!Myj5#Lxi3ZKwh2YJvg1XIuf0WHte+VGsd-UFrc)TEqb(SDpa*RCo9&QBn8%PAl7$Ozk6!Nyj5#Mxi4ZLwh3YKvg2XJuf1WIte0VHsd+UGrc-TFqb)SDp

15、a(RCo9*QBn8&PAm7%Ozl6$Nyk5!Mxj4#Lwi3ZKvh2YJug1XItf0VHse+UGrd-TFqc)SEpb(RDoa*QCn9&PBm8%OAl7$Nzk6!Myj5#Lxi3ZKwh2YJvg1XIuf0WHte+VGsd-UFrc)TEqb(SDpa*RCrc-TEqb)SDpa(RCo9&QBn8%PAm7$Ozl6!Nyk5#Mxj4ZLwi3YKvh2XJug1WItf0VHse+UGrc-TFqb)SEpa(RDo9*QCn8&PBm7%OAl6$Nzk5!Myj4#Lxi3ZKwh2YJug1XItf0WHse+V

16、Grd-UFqc)TEpb(SDoa*RCn9&QBm8%PAl7$Ozk6!Myj5#Lxi4ZKwh3YJvg2XIuf1WHte0VGsd+UFrc-TEqb)SDpa(RCo9&QBn8%PAm7$Ozl6!Nyk5#Mxj4ZLwi3YKvh2XJug1WItf0VHse+UGrd-TFqb)SEpa(RDo9*QCn8&PBm7%OAl6$Nzk5!Myj4#Lxi3ZKwh2YJvg1XItf0WHse+VGrd-UFqc)TEpb(SDoa*RCn9&QBm8%PAl7$Ozk6!Nyj5#Lxi4ZKwh3YJvg2XIuf1WHte0VGsd

17、+UFrc-TEqb)SDpa+UGrc-TFqb)SEpa(RCo9*QBn8&PAm7%Ozl6$Nyk5!Mxj4#Lwi3ZKvh2YJug1XItf0WHse+UGrd-TFqc)SEpb(RDoa*QCn9&PBm8%OAl7$Nzk6!Myj5#Lxi4ZKwh2YJvg1XIuf0WHte+VGsd-UFrc)TEqb(SDpa*RCo9&QBn8%PAm7$Ozk6!Nyj5#Mxi4ZLwh3YKvg2XJuf1WIte0VHsd+UGrc-TFqb)SEpa(RCo9*QBn8&PAm7%Ozl6$Nyk5!Mxj4#Lwi3ZKvh2YJ

18、ug1XItf0WHse+UGrd-TFqc)SEpb(RDoa*QCn9&PBm8%OAl7$Nzk6!Myj5#Lxi4ZKwh2YJvg1XIuf0WHte+VGsd-UFrc)TEqb(SDpa*RCo9&QBn8%PAm7$Ozl6!Nyj5#Mxi4ZLwh3YKvg2XJuf1WIte0VHsd+UGrc-TFqf0VHse+UGrd-TFqb)SEpa(RDo9*QCn8&PBm7%OAl6$Nzk5!Myj4#Lxi3ZKwh2YJvg1XItf0WHse+VGrd-UFqc)TEpb(SDoa*RCn9&QBm8%PAl7$Ozk6!Nyj5#Lxi4ZKwh3YJvg2XIuf1WHte0VGsd+UFrc-TEqb)SDpa(RCo9*QBn8&PAm7$Ozl6!Nyk5#Mxj4ZLwi3YKvh2XJug1WItf0VHse+UGrd-TFqc)SEpa(RDo9*QCn8&PBm7%OAl6$Nzk5!Myj4#Lxi3ZKwh2YJvg1XIuf0WHse+VGrd-UFqc)TEpb(SDoa*RCn9&QBm8%PAl7$Ozk6!Nyj5#Mxi4ZKwh3YJvg

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