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用待定系数法分解这一题：2x^2--12xy+18y^2+8xz--24yz+6z^2第二题;已知多项式2x^4--3x^3+ax^2+7x+b有一个因式是x^2+x--2,试求a/b的值 (1)a^3(b-c)+b^3(c-a)+c^3(a-b); (2)a^3+b^3+c^3+bc(b+c)+ca(c+a)+ab(a+b) 2 2 x +3ax-10a -x+2a为什么=（x-2a)(x+5a-1)?2 2 2 (x -7x+6)(x -x-6)+56为什么=(x -4x-4)(x-5)(x-1)?1、第一个平方在X后面，第2个平方在3ax“a”后面2、第一个平方在第一个括号X后面，第2个平方在地2个括号第一 I want to buy you a schoolbag.保持原意Teamed eggs with pork is my favourite dish.保持原意 一.用括号内所给词的适当形式填空1.Martin’s mother didn’t give up_________(try)to help him2.Martin decided_____________(change)his bad habit3.Since he telephoned his mother,Martin____________(change)4.I don’t know how___________(sw I.根据句意及首字母提示补全单词.1.Who d（ ）the fact at last?2.If you want to i（ ）your English,you must work harder.3.I want to be a tour g（ ）when I grow up.4.The flight a（ ）in the plane is very friendly.5.Our country has c It's very cold outside.I'll watch TV at home.I won't go out.(合并为一句)It's very cold outside.I'll watch TV （ ）（ ）（ ）out.They are working hard on the farm.(感叹句)（ ）on the farm!到底谁对啊。等明天答案出来再说 两道英语题!速度,在线等!3.How can you tell it is a letter and not a story?How ___you __ it is a letter and not a story ? 4. I have already read the whole text.(否定 句,疑问句） I often go home by bus.（对划线部分提问） ______划线部分是by bus I often go online at the weekend.（go online）（对划线部分提问） Ben and Jack often go home together after school.对划线部分提问划线部分是after school 因式分解（最好有步骤) 因式分解怎么做,步骤! 1.16-(X-2)*22.(R+X)*2-2(R+S)+1 2道因式分解的题1、已知关于x的多项式3x^2+x+m因式分解后有一个因式(3x-1),求m的值,并分解因式2、多项式x^2+px+12可分解为两个一次因式的积,整数P的值是?（写出所有情况） 3a^3-12a^2+12a1/4m^3n-1/4m^2n^2+1/16mn^3 关于因式分解这一方面的2道题.高手进.急用.第一道题是：一直m=8,n=-1/8(负的八分之一）,求m^2+mn-7m-7n的值.第二道题是：如果M=ab+1, N=a+b,且a>1. bN嘛?说明理由.!要是会的话帮忙解答下来可以嘛,?谢 Tony often downlods- pop -music from the Internet.（对划线部分提问） 上网有利还是有弊.发表自己的观点.写一篇英语作文.should we often surf on the internet___ 对大写部分提问 they OFTEN surf the internet 4a^2-（b+c）^2^=什么什么的次方，比如2^2就是2的2次方 一道初二英语单选题Kevin ( ) to work in his hometown after he graduated from univrsity.A.goes B.went C.will go D.had gone i often did some housework at home（ 同义句转换）i----------- ------------do some housework at home Why don't you do some housework at home?(改为否定句） ___ ____do some housework at home? 因式分解2道1.m^2(m-n)+n^2(n-m)2.9a^3b+6a^2b^2+ab^3 i often did some housework at home（ 同义句转换）bui often did some housework at home（ 同义句转换）i----------- ------------do some housework at home 求做2道因式分解25x^2-(4x-3y)^2m^4-18m^2n^2+81n^4 We often eat lunch at home(改为一般疑问句)还有：You can do an experiment on me(改为祈使句)They like sweet food(改为否定句)Are they eating vegetables(用honey改为选择问句)That's intersting(改为感叹句) 求帮忙做2道因式分解2a(a-3)^2-6a^2(3-a)+8a(a-3)36a^2-24ab+4b^2 2道因式分解、急~1. （x+1)²-9(x-1)²2. 4a²b²-（a²+b²-c²)² My sister gets home at 8:00 pm.(对划线部分提问) 快 因式分解a^5+a-1(超难的)