分解因式整式化简练习题及答案

分解因式整式化简 练习题 用券下载整式乘法计算练习题幼小衔接专项练习题下载拼音练习题下载凑十法练习题下载幼升小练习题下载免费 及 答案 八年级地理上册填图题岩土工程勘察试题省略号的作用及举例应急救援安全知识车间5s试题及答案 25.如果单项式与是关于x、y的单项式,且它们是同类项. (1)求的值. (2)若=0,且xy?0,求的值. 26.先化简再求值。 (1),其中x=. (2)已知,计算3A-2B. (3)已知,求的值. (4)若,求的值. 27.某同学做一道数学题,误将求“A-B”看成求“A+B”, 结果求出的答案是.已知 ,请正确求出A-B. 28.有理数a、b、c在数轴上对应点为A、B、C,其位置如图所示, 试去掉绝对值符号并合并 同类项:. 29.某移动通讯公司开设了两种通讯业务:“全球通”使用者缴50元月租费, 然后每通话1分钟再付话费0.4元;“快捷通”不缴月租费,每通话1分钟,付话费0,6 元(本题的通话均指市内通话).若一个月内通话x分钟,两种方式的费用分别为y1 元和y2元. (1)用含x的代数式分别表示y1和y2,则y1= ,y2= . (2)某人估计一个月内通话300分钟,应选择哪种移动通讯合算些? 30.探索规律。 (1)计算并观察下列每组算式: (2)已知25×25=625,那么24×26=__________. (3)从以上的过程中,你发现了什么规律,你能用语言叙述这个规律吗?你能用代数式表示设 这个规律吗? 31.在一次水灾中，大约有个人无家可归，假如一顶帐篷占地100米，可以放置40个床位，为了安置所有无家可归的人，需要多少顶帐篷,这些帐篷大约要占多少地方,估计designate a person responsible for periodically repaired, if significant quality problems, whether it's design or construction reasons, are required at the first meeting to study and propose solutions; 5) post through re-examination on the basis to resolve all remaining issues, well prepared for formal acceptance. 9, officially accepted: 1) the letter of acceptance issued by the Chief Engineer, project manager, and submitted it to the construction completion data; 2) by the employer organization design, supervision and quality supervision stations, construction and other construction units work together to check the quality and acceptance of views put forward, assessed quality rating; 3) Unit checked and confirmed after the completion of works comply with the standards and requirements, issue a certificate of completion to the construction unit, construction and design, quality supervision station, the engineer, civil engineering and other units to sign the certificates of completion; 4) signed a final acceptance certificate and construction unit, and according to the contract provisions of settlement procedures, unless indicated in the contract by the contractor of the warranty work, economic and legal responsibilities of each party are able to remove; 5) get the files transfer and project procedures. 10 quality tracking, maintenance plan is an important part of our quality assurance system, the company sold products and installation works are carried out by the after-sales service obligations. In particular, we developed a departmental duties and quality guarantee measures, as follows: 1) visited customers and product usage information. 2) collect customer feedback, product information, customer reports, complaints. 3) based on customer comments and respond promptly to complaints, to the site to identify the cause analysis, engineering quality problems and fill in the data form. 4) record type, the location, cause, and complete solutions. 5) identify reasons to propose solutions and, 你的学校的操场可安置多少人,要安置这些人，大约需要多少个这样的操场, 2 32.化简:?(x-9). 233.已知P=，Q=(x+y)-2y(x+y)，小敏、小聪两人在x=2-y=-1的条件下分别 计算了P和Q的值(小敏说P的值比Q大，小聪说Q的值比P大(请你判断谁的结论正确， 并说明理由( 56. 57. 58. 59. 60.，其中。 61.已知 当时，求 的值。 62. 63. 64. 65. 66.分解因式: designate a person responsible for periodically repaired, if significant quality problems, whether it's design or construction reasons, are required at the first meeting to study and propose solutions; 5) post through re-examination on the basis to resolve all remaining issues, well prepared for formal acceptance. 9, officially accepted: 1) the letter of acceptance issued by the Chief Engineer, project manager, and submitted it to the construction completion data; 2) by the employer organization design, supervision and quality supervision stations, construction and other construction units work together to check the quality and acceptance of views put forward, assessed quality rating; 3) Unit checked and confirmed after the completion of works comply with the standards and requirements, issue a certificate of completion to the construction unit, construction and design, quality supervision station, the engineer, civil engineering and other units to sign the certificates of completion; 4) signed a final acceptance certificate and construction unit, and according to the contract provisions of settlement procedures, unless indicated in the contract by the contractor of the warranty work, economic and legal responsibilities of each party are able to remove; 5) get the files transfer and project procedures. 10 quality tracking, maintenance plan is an important part of our quality assurance system, the company sold products and installation works are carried out by the after-sales service obligations. In particular, we developed a departmental duties and quality guarantee measures, as follows: 1) visited customers and product usage information. 2) collect customer feedback, product information, customer reports, complaints. 3) based on customer comments and respond promptly to complaints, to the site to identify the cause analysis, engineering quality problems and fill in the data form. 4) record type, the location, cause, and complete solutions. 5) identify reasons to propose solutions and, (1); (2)已知(求的值( 67.化简:. 68.化简求值:，其中a=( 2 69.先化简再求值:，其中a满足a-a=0( 70.先化简(1+，然后请你给a选取一个合适的值，代入求值( 25.考点:15.1 整式的加减 200233 试题 中考模拟试题doc幼小衔接 数学试题 下载云南高中历年会考数学试题下载N4真题下载党史题库下载 解析:(1)先求a=3,(7a-22)=1(2)a=3时,2mxy-5nxy=0,又xy ?0 得2m-5n=0则 原式=0 答案:见解析 26.考点:15.1 整式的加减 22试题解析:(1)原式=-x-3y值为1(2)4x+18x-31(3)原式=2(m+3mn)+5,值为15(4) 原式= 答案:见解析 27.考点:15.1 整式的加减 试题解析: 2 答案:A-B=2A-(A+B)=5x-4x-17 28.考点:15.1 整式的加减 试题解析: 答案:原式=-c-(-b-c)+(a-c)+(-b-a)=-c 29.考点:15.1 整式的加减 试题解析:(1)y=50+0.4x y=0.6x(2)x=300时,y=170 y=180 故选“全球通”合算1212 答案:见解析 designate a person responsible for periodically repaired, if significant quality problems, whether it's design or construction reasons, are required at the first meeting to study and propose solutions; 5) post through re-examination on the basis to resolve all remaining issues, well prepared for formal acceptance. 9, officially accepted: 1) the letter of acceptance issued by the Chief Engineer, project manager, and submitted it to the construction completion data; 2) by the employer organization design, supervision and quality supervision stations, construction and other construction units work together to check the quality and acceptance of views put forward, assessed quality rating; 3) Unit checked and confirmed after the completion of works comply with the standards and requirements, issue a certificate of completion to the construction unit, construction and design, quality supervision station, the engineer, civil engineering and other units to sign the certificates of completion; 4) signed a final acceptance certificate and construction unit, and according to the contract provisions of settlement procedures, unless indicated in the contract by the contractor of the warranty work, economic and legal responsibilities of each party are able to remove; 5) get the files transfer and project procedures. 10 quality tracking, maintenance plan is an important part of our quality assurance system, the company sold products and installation works are carried out by the after-sales service obligations. In particular, we developed a departmental duties and quality guarantee measures, as follows: 1) visited customers and product usage information. 2) collect customer feedback, product information, customer reports, complaints. 3) based on customer comments and respond promptly to complaints, to the site to identify the cause analysis, engineering quality problems and fill in the data form. 4) record type, the location, cause, and complete solutions. 5) identify reasons to propose solutions and, 30.考点:15.1 整式的加减 2 试题解析:1.略 2.624 3.(n-1)(n+1)=n-1 答案:见解析 31.考点:15.4 整式的除法 试题解析: 答案:6250顶帐篷，占米的地方，后面答案视操场的大小定。 32.考点:15.5 因式分解 试题解析: 答案:x+3 33.考点:15.5 因式分解 2试题解析:?P===x+y，?当x=2，y=-1时，P=1，?当Q=(x+y)-2y 22 (x+y)=x-y，?当x=2，y=-1时，Q=3，?P