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化简下面各比5分之2:3分之1 （1）若|x+y+5|+(xy-6)的平方=0,求 x的平方+y的平方 （2）若a²+b²+4a-6b+13=0,求a的b次方.（3）若x²-4x+y²+2y+5=0,求2x-y²（4）已知a²b²+a²+b²+1=4ab,求a和b（5）已知x²-4x+1=0, 分解因式：(1)（x+y）的3次方+125 (2)a的3次方c-4a平方bc+4ab平方c （3）xy-1-x+y He was born on the morning of December 8th 可不可以去掉of?He was born on December 8th morning?the first one to do sth可不可以说the first one doing sth I————breakfast at seven为什么不能填eat?为什么be good for health不是he He likes winter.He was born ____the morning of December 24th,1994 A on B in C at D for He was born ______ the moring of December 8th. He was born ( ) a morning ofHe was born ( ) a morning of May She was born -- the morning of December 12th,1993Q1 填in还是on?Q2She was born -- December 12th morning1993放在哪里,空格填什麽?Q3The girl was born -- a poor family. Yhomas Edison was born （in Milan,Ohio on February11,1847）.对括号部分提问 阅读理解根据短文的内容回答问题 Thomas Edison was a famous American scientist.He was born in 1847.根据短文的内容回答问题Thomas Edison was a famous American scientist.He was born in 1847.When he was a child,he liked to find ou 陈冠希是CBC,是指Canadian-Born Chinese,还是Chinese-Born Chinese? Edison is a great scientist,He was born in 1847.He is a world-famous scientist and inventor power of the United States, as the "King of the invention of the world." In addition to his phonograph, electric, cable, film, and other aspects of the invent 你能找到适当的x的值使得多项式A=4x^2+2x-1与B=3x^2-2相等吗? +14-10-（-9）+（-5）化简 1 9立方分米=（）L980平方分米=（）ml9.4立方米=（）平方分米780ml=（）L=（）立方厘米2一个长方体水池占地6平方分米,池深1.5m,池内最多能容水（）L?一块木料长2m,横截面边长是0.4m的正方形,这 2007²-2008*2006+（-三分之二）2007次方*（二分之三）2008次方*（-2008）º 若代数式ax³-3x²-cx-3x³+bx²-3是关于x的二次式,则( )A、a=3,b≠3 B、a≠3,b=3C、a≠3,b≠-3 D、a=-3,b=-3 已知(3x+1)^3=ax^3+bx^2+cx+d,则代数式a-b+c-d 当x=-2时,ax³+x²+cx的值为0,求当x=2时,代数式ax³+x²+cx的值 当x的值为-3时,代数式-3x ²+ax-7的值是-25,则当x=-1时,这个代数式的值为 怎么化简分数,比如：5:2.5 代数式2x²-3x+2的值为7,则x²-3/2x-1的值是多少 如果代数式3分之2x²-x+1的值为2,那么代数式2x²-3x的值为 五年级数学题 黄冈小状元用110cm长的角铁焊出一个长方形框架,长是宽的2倍,宽是高得1.5倍,求这个长方形的长、宽、高.这个是五年级下册黄冈小状元上16页第3题～～～写错了，应该是长方体 若要关于x的代数式1/4mx³-2x³+2/3x²-2x+3合并同类项后不再出现含x³的项,计算m的值同上 小学五年级黄冈小状元数学题食堂买来7桶油,没桶油质量相等,如果从没桶油中各取出30.4千克油,则剩下的油与原来3桶油的质量相等.原来没桶油重多少千克? 4(2p+3q)的平方-（3p-q）的平方 好人.. 在(x²+ax+b)(2x²-3x-1)的积中,x³项的系数是-5,x²项的系数是-6,求a、b的值 求英文翻译,What was your home town/state at the time of admission to MIT? .翻译- Confucius came back to Lu,his home state,_at_ the age of 69. I am___ (dream)of having a home in the countryside far from the town 翻译：The Great Ape Trust in the American state of Lowa is the home to seven bonobos and three orangutans .