欢迎来到天天文库
浏览记录
ID:39199198
大小:60.50 KB
页数:18页
时间:2019-06-27
《整式加减混合运算》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、(1)7-3x-4x2+4x-8x2-15(2)2(2a2-9b)-3(-4a2+b)(3)8x2-[-3x-(2x2-7x-5)+3]+4x(4)(5x-3y-2xy)-(6x+5y-2xy)(5)3a2b-[2ab2-2(ab-1.5a2b)+ab]+3ab2(6)2x-3y)+(5x+4y)(7)(8a-7b)-(4a-5b)(8)-(3x-2y+z)-[5x-(x-2y+z)-3x](9)2(7x2+5x-3)-3(5x2-3x+2)(10)2b3+(3ab3-a2b)-2(ab2+b3)(11)(-6x2+5xy)-12xy-(2x2-9xy)(12)(x2-2x3+
2、1)-(-1+2x3+2x2),其中x=2(13)3a-[-2b+(4a-3b)],其中a=-1,b=3(14)3ab-4ab+8ab-7ab+ab=(15)7x-(5x-5y)-y=(16)23a3bc2-15ab2c+8abc-24a3bc2-8abc=(17)-7x2+6x+13x2-4x-5x2=(18)2y+(-2y+5)-(3y+2)=(19)(2x2-3xy+4y2)+(x2+2xy-3y2)=(20)2a-(3a-2b+2)+(3a-4b-1)=(21)-6x2-7x2+15x2-2x2=(22)2x-(x+3y)-(-x-y)-(x-y)=(23)2x+2y-
3、[3x-2(x-y)]=5-(1-x)-1-(x-1)=(24)已知A=x3-2x2+x-4,B=2x3-5x+3,计算A+B=(25)若a=-0.2,b=0.5,代数式-(
4、a2b
5、-
6、ab2
7、)的值为(26)-(2x2-y2)-[2y2-(x2+2xy)]=(27)(-y+6+3y4-y3)-(2y2-3y3+y4-7)=(28)4x2-[7x2-5x-3(1-2x+x2)]=(29)3a-(2a-3b)+3(a-2b)-b=(30)x-[y-2x-(x+y)]=3x-[y-(2x+y)]=(31)4a2n-an-(3an-2a2n)=(32)2x2y+3xy2-x2+2x
8、y=(28)-5xm-xm-(-7xm)+(-3xm)=(29)当a=-1,b=-2时,[a-(b-c)]-[-b-(-c-a)]=(30)当a=-1,b=1,c=-1时,-[b-2(-5a)]-(-3b+5c)=(31)-2(3x+z)-(-6x)+(-5y+3z)=(32)-5an-an+1-(-7an+1)+(-3an)=(33)3a-(2a-4b-6c)+3(-2c+2b)=(34)9a2+[7a2-2a-(-a2+3a)]=(35)当2y-x=5时,5(x-2y)2-3(-x+2y)-100=(28)3ab-4ab+8ab-7ab+ab=(29)7x-(5x-5y)-
9、y=(30)23a3bc2-15ab2c+8abc-24a3bc2-8abc=(31)-7x2+6x+13x2-4x-5x2=______.(32)2y+(-2y+5)-(3y+2)=______.(33)(2x2-3xy+4y2)+(x2+2xy-3y2)=______.(34)2a-(3a-2b+2)+(3a-4b-1)=______.(35)-6x2-7x2+15x2-2x2=______.(36)2x-(x+3y)-(-x-y)-(x-y)=______.(37)2x+2y-[3x-2(x-y)]=______.(38)5-(1-x)-1-(x-1)=______.(2
10、8)()+(4xy+7x2-y2)=10x2-xy.(29)(4xy2-2x2y)-()=x3-2x2y+4xy2+y3.(30)已知A=x3-2x2+x-4,B=2x3-5x+3,计算A+B=______.(31)已知A=x3-2x2+x-4,B=2x3-5x+3,计算A-B=______.(32)若a=-0.2,b=0.5,代数式-(
11、a2b
12、-
13、ab2
14、)的值为______.25.一个多项式减去3m4-m3-2m+5得-2m4-3m3-2m2-1,那么这个多项式等于______.(33)-(2x2-y2)-[2y2-(x2+2xy)]=______.(34)若-3a3b2
15、与5ax-1by+2是同类项,则x=______,y=______.(28)(-y+6+3y4-y3)-(2y2-3y3+y4-7)=______.(29)化简代数式4x2-[7x2-5x-3(1-2x+x2)]的结果是______.(30)2a-b2+c-d3=2a+()-d3=2a-d3-()=c-().(31)3a-(2a-3b)+3(a-2b)-b=______.(32)化简代数式x-[y-2x-(x+y)]=______.(33)[5a2+()a-7]+[()a2-4a+()]=a
此文档下载收益归作者所有