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（3x方+5）（-3x方+5）-x方（7x+8）(7x-8)-(8x)方 其中x=-2 8+0.7X=18-3.3X方程怎么解 解方程组x^2-2xy-3y^2=0,x-2y=6 方程组x^2-2xy-3y^2=0 x^2+6y=-2,的解的个数是 解方程组：x-y=2与x^2-2xy-3y^2=0 英语高手帮看看这篇文章有什么语法错误 In order to wield the spring the common people,ask the country to rear in a pen all wild tigers!Very are perhaps many the human to say that,you such said or protects the wild tiger?Ya,your everyb 急!高一数学必修一必修四知识点总结 高一数学必修1和必修4的知识点总结 高一数学必修二知识点总结 0.4分之(7x-5)=0.8分之3x 已知方程2x加3y等于二当x与y互为相反数,求x,y的值. 已知方程2x+3y=2 用含y的代数式表示x 我写了篇英语文章,希望大家帮我找找语法错误As we all know the 2008 Olympic Games will be held in Beijing,which will absorbed all over the world to pay attention to china.Olympic Games is grand sports competition with different althe 谁能帮我修改下我写的英语文章?好象很多语法错误.The C&D xiamen international marathon is held once a year,2009 C&D xiamen international marathon will start to next saturday,this competition is a cheerful occasion.My father and I h y=(m-2)x^m^2是正比例函数,则m=___函数.解析式___.y=(m-2)x+m-3是正比例函数,则m=___.解析式___. 自己写了个英语短文,麻烦大家指出语法错误,或有什么更好的表达方式,How to improve the efficiency of studying English?First ,we must have great interest in englishSecond,we should practice English every dayLast,if we had cond y=(m-2)x^m^2是正比例函数,则m=__函数.解析式是__.y=(m-2)x+m-3是正比例函数,则m=__.解析式__. 若函数y=(m-2)x+5-m是正比例函数,则m的值为（）,此函数的解析式为（）. 若y=(m-2)x的3-│m│次方+2n-5是正比例函数,求m n的值及函数的解析式 高一数学必修5,求通项公式在数列{an}中,若a1=1,且an+1=2an+3,则该数列的通项an=求高手给出答案,并给步骤! (1/3-0.25)x=1.2 5/7x-1/3x=24一个数的5/8比123/4多6,这个数是多少 高一数学必修四前两章公式总结 当m,n为何值时,y=(m-2)x^2n+1-m+n是一次函数?又何时喂正比例函数? 函数y=(m-2)x的2n加1次方-m+n,当m=____,n=____时为正比例函数;当m=____,n=_____时为一次函数 已知函数y=(n-1)x^(n方+2n+2)+m+3① 当n为多少时,y是x的一次函数?②当y是x的正比例函数求M+N的值 y=（m-2）x^2n+1-m+n 求m为什么,n为什么时为正比例函数 当m,n为何值时,y=(2m-1)x的5-2n+(n+m)是一次函数?何值时为正比例函数? 0.3分之0.3x+0.2-0.15分之0.02x-0.04小于1+5分之7x-3 改英语语法错误I entered ChangZhou engineering institue in SEP 2006,and i studied computer networking there.In SEP 2008,I went to Canada to continue studied computer networking,however,my favor is not in computer.I like business,so I came back 帮忙改英语语法错误和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐和谐After a certa