化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)

化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)

化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
[(x-y)/(x+3y)]/[(x^2-y^2)/(x^2+6xy+9y^2)]-xy/(x+y)
=(x-y)/(x+3y) * (x+3y)^2/(x-y)(x+y)-xy/(x+y)
=(x+3y)/(x+y)-xy/(x+y)
=(x-xy+3y)/(x+y)
=1-y(x-2)/(x+y)

=xyxyxyxyyyx

U.S. supremacy is not a soccer country, Former U.S. president is not like football much, but this not the same, the first in U.S. history, African-American president is a standard of football fans. Th...

全部展开

U.S. supremacy is not a soccer country, Former U.S. president is not like football much, but this not the same, the first in U.S. history, African-American president is a standard of football fans. The U.S. team left for South Africa before the Americans enjoy the greatest glory --- to the White House to accept President Obama and a joint meeting with former President Bill Clinton, Obama even said he would in the Oval Office (President's Office) to see Team USA game live television! As of early June, the number of U.S. fans to purchase tickets has more than 170,000, more than the sum of the British and German fans after the host. This figure for the South African side and the U.S. authorities are upset at the end of May the U.S. State Department has issued notice the security situation in South Africa: South Africa is not safe enough, to have all the Meiguo Ren Qu World Cup to the United States Department Bao Gao Xiang Guan, Yi Bian and the U.S. government Baochi Xinxigoutong. Most Americans is a tension from the British "Daily Star" reports that Al Qaeda has put the U.S. team on June 12 and the war as an attack on England's first choice! Al Qaeda has repeatedly threatened the Iraqi security forces do not come from nowhere has captured a 名叫卡赫塔尼 "base" organization militants, he and Osama bin Laden's aide al-Zawahri plot to launch World Cup against South Africa terrorist attacks. Iraqi security forces, investigators said, the terrorists called Abdullah al-Kahtani, 31, was a Saudi army, a colonel, he was from Saudi Arabia to Iraq, a "base" branch of the Organization in Iraq a leader in charge of security affairs. In 2007, a pseudonym for the 穆扎瓦尔沙 Wali's Kahtani was arrested by U.S. forces, but was released last year. "Kahtani with al-Zawahiri ('base' organization on the 2nd figure in Osama bin Laden's aide) conspired to launch a series of terrorist attacks in South Africa." In March this year, "base" organizations have been published in North Africa Division a statement, the organization in an online magazine published a statement: "When the world live in the United States team at the match with England, the stadium packed with spectators, a sudden explosion rocked the bleachers, the stadium shaking moment , in ruins, hundreds of bodies scattered on the ground, it will be just as shocking scene ah! "The statement also pointed out that France, Germany and Italy are the targets. South Africa's "Sunday Times" quoted a senior fellow South African Institute of International Affairs Frank Fanlu Yan as saying, "We certainly are vulnerable to suicide bombings or car bombings. Right now all indications are that Al Qaeda is planning on launching the World Cup type attack. "He believes that South Africa's response to the face of terrorist attacks will be invulnerable action, but the anti-terrorist intelligence would be" the only Achilles heel. " "Sunday Times" that, according to the National Defence Joint Operations Centre to provide information within two, the center has acquired a list of as many as 40 terrorists. Pretoria, South Africa,power leveling, the heavily guarded visit the CIA early in 2006 World Cup in Germany, the U.S. team live in the nearby U.S. military base in Kaiserslautern. Before the game the day before they race to fly. Hotel two blocks away they have to live soldiers standing guard near the average person simply can not. U.S. team was eliminated in the group stage, the person responsible for security lips do not say, but 10 thousand happy hearts. The U.S. team arrived at Johannesburg International Airport, Tan Bo scene, fans dubbed the United States is like "24" Di Jiuji the shooting scene. Also arrived in South Africa, the United States and Argentina are treated completely different. The latter met at the airport is large and enthusiastic fans, while the former is a heavily armed security, has maintained a state ready to fire. Earlier than the U.S. team, "landing" is the CIA, the CIA. A working team of the CIA as early as mid-May has arrived in the United States team of resident Pretoria, the hotel where they block the team rented a house, the agents checked the U.S. team members may go through or reach the area, including running routes, shopping malls, bus stop location, the interview focused on the regional players such as South Africa, the local security department of a small parking lot will be closed, then, the region will not open. "Car bomb" was the Americans considered the team most in need in South Africa, one security guard. Pretoria local media interviewed several residents living in the region, and the answer may make the U.S. team is very embarrassing. "Suddenly, I was informed not stop here, and that there are important guests, but no one to tell me more. Then I know that is because the American team to arrive, in fact I do not think they are really dangerous, if they are out walking, I might greet them. "a man named Warren who was interviewed said. South African police security guards for all teams set level, from high, middle and low third-class. The United States and England are high. Scarlet Carnival Algeria Algeria winning price broke again after a lapse of 24 years after the World Cup finals, but in qualifying phase, the team win a ball each paid with their lives. September 6 last year, the Algerian team at home against Zambia team, eager to buy tickets for fans and security personnel in conflict, resulting in dozens of fans and six police were injured; when the Algerian team after team victory over Zambia, Algeria fans Carnival , 5 people were killed and 95 injured. On October 11 last year, Algeria 3 to 1 victory over home team in Rwanda,world of warcraft powerleveling, once again led to four deaths and 168 injuries tragedy. Of course, the most painful memories or playoff team last year beat Algeria, Egypt team into the medal after the 32, 18 Algerian fans died from road accidents and another 312 people were injured! Another 145 fans a heart attack caused by over-excited. Algeria before the start of World Cup Football Association was also informed to the group stage to get 150,000 euros per person a reward, which undoubtedly is very cruel. 87% of the land was covered by the Algerian Sahara in 2009,power leveling, per capita GDP reached 1,890 U.S. dollars, ranked No. 7 in Africa. Algeria, many people only monthly income is 2000 yuan, which compared to Apple's 15 yuan / kg, bananas 12 yuan / kg, beef and mutton 60 yuan / kg in terms of prices, income levels. Therefore, the 15 million euro prize what it means to everyone. 1986 World Cup, Algeria Football Association has happened in the money owed something, then the group stage match against Spain before the players even threatened to refuse to play. In addition to bonuses, the local players and has the French origin of the conflict brewing between the players. An inevitable topic, once the French colony of Algeria, the national team of 23 NPC list, 17 have French ancestry, or even born in France. U.S. team went to South Africa where tensions have run the ball the Clinton Police fear Obama is American history at home watching the first men's World Cup (1994) president, in fact, he also chaired the 1999 Women's World Cup, is also only one world to the President of the World Cup as experienced politicians gender. Clinton is also easy to handle at their doorstep watching, Obama want to go watch the harder to South Africa, the Obama attaches great importance to the World Cup,wow power leveling, first to Vice President Biden army expedition to watch the U.S. team and the England team first game. Then he also said he may be in the United States into the medal went to South Africa after the knockout stage of the ballpark. Barack Obama 6-year-old living with his mother in Indonesia during the mad chase of regular football in the street, back to the United States, Obama has not given up football, still be regarded as a football fan. Obama likes football has also been greatly affected his family in 2003 to visit a sister living in the UK, they also watched a Premier League West Ham United. Two years ago Barack Obama to participate in the U.S. presidential election, and he would visit the soccer field, play football in the stadium cheering the little daughter. South African police chief Beiqisaile report to Congress World Cup security work, said: "The biggest problem is ... ... the U.S. President to come or not?" The police report of the Commission to the Congress he said: "We are all praying U.S. team was eliminated in the group stage. They were eliminated, could return as early as possible. because we know that if the U.S. team reached the knockout, Obama might will come. "Beiqisaile points to a great truth . Have 43 heads of state, said at the group stage will be to watch the battle in South Africa, Sailor, said: "Protection of the police alone have an American president and the protection of 43 heads of state of the police is enough as many." Sailor mean in fact: the U.S. President, if coming, is not the World Cup hosted by South Africa, but the exercise of a Counter-Strike. (Editor: Fan Kai)
The Relative News:


world of warcraft powerleveling stream wooded

wow power leveling

power leveling Dalian

ELong phone book business on-line access to monthly production target is to dou

power leveling Queensland Region

Dealers - hot car prices old car price cuts relatively stable up to _510

power leveling

Fishing Kings iPad Fishing _177

收起