先化简再求值x2-1x-1+x(1+1x)，其中x=2-1．-数学

更多内容推荐

• The specialist at the meeting will give us a lecture next week . A．referredB．referred toC．referringD
• 先化简，再求值．（1）3-a2a-4÷(a+2-5a-2)，其中a=-4．（2）x-4x2-1÷x2-3x-4x2+2x+1+1x-1，其中x=6．-数学
• —Who is the man ______ by a group of students there?—A professor _____ research on physics.A．followe
• terrible, the milk can’t be drunk againA．SmellsB．SmelledC．SmellingD．To smell-高二英语
• 请按下列程序n→平方→+n→÷n→-n→结果，计算当n=2时，结果=______；当n=2008时，结果的平方根=______．-数学
• 先化简，再求值：，其中x=-2。-八年级数学
• 先化简，再求值：x2-1x2+2x+1，其中x=3．-数学
• 先化简，再求值：a2-b2a+(a-2ab-b2a)，其中a=3，b=2．-数学
• 先简化x-1x÷(x-2x-1x)，再任选一个适当的x值代入求值．-数学
• We can hardly him if we all work in the same school.A．to avoid meetingB．avoid to meetC．avoid meeting
• 已知1x-1y=2，求3x+7xy-3y2x-3xy-2y的值．-数学
• Exciting as its special effects are ________, there is too much violence in the film.A．to watchB．to
• Experts say ________ to sunlight for too much time will do harm to one’s skin.A．exposedB．having exp
• These students are quick at learning. We’ll have them __________ with new methods.A．trainingB．to tra
• 先化简，然后请你选择一个合适的x的值代入求值：x2-4xx+3÷4-xx．-数学
• 先化简，再求值：，其中．-八年级数学
• 化简：2x-6x2-9+x2+2x+1x2+x-6÷x+1x-2-数学
• It is requested that the reporter _______ to blame for the wrong report.A．referring toB．referring to
• A direct air route _______ Chongqing and San Francisco is expected to open next month．A．linkingB．be
• 先化简，再求值(2a+1-1a-1)÷aa2-1，其中a=2．-数学
• 先化简，再求值：2x2-3xx-（x+1）2，其中x=3．-数学
• 化简求值：x2+2x+1x+2÷x2-1x-1-1x+2，其中x=2．-数学
• ____, I had to buy a new one.A．My dictionary losingB．My dictionary having been lostC．Because my dict
• I’m very happy ___ a chance ___ your school.A．to give… to visitB．giving… visitingC．to be given…to v
• 已知a2+2a=8，则1a+1-1a2-1÷a+1a2-2a+1的值为______．-数学
• 已知P=a2+b2a2-b2，Q=2aba2-b2，用“+”或“-”连接P，Q共有三种不同的形式：P+Q，P-Q，Q-P，请选择其中一种进行化简求值，其中a=3，b=2．-数学
• I received a letter yesterday that my mother would come to our school.A．saidB．saysC．sayingD．to say-高
• To learn the piece of music quickly, you'd better hear it ___ as many times as possible.A．playB
• 化简的结果为（）。-八年级数学
• 先化简2x-4x2-4÷2xx+2-1，再任选一个你喜欢的数代入求值．-数学
• ______ money, his parents couldn’t send him to university.A．LackedB．Lacking ofC．Lacked inD．Lacking-
• Under the environment of fierce competition, the only way John could imagine _______ stress was to g
• Elizabeth Blackwell, who in 1849 became the first woman ever a medical degree in the USA, fought wom
• 已知x=-32，求（1+1x+1）•（x+1）的值．-数学
• _____ on a clear day, far from the city crowds, the mountains gave him a sense of peace.A．If walkin
• 先化简再求值：x-32x-4÷x2-9x-2，其中x=-5．-数学
• 先化简，再求值：2x+1-1x2-1÷xx2-2x+1，其中x=5．-数学
• 请将aa-1÷a2-aa2-1+11-a化简，然后从-2、-1、0、1、2中选择一个你认为合适的数作为a的值代入其中求值．-数学
• Seeing the soldiers well _____ for the flood-fight, the general nodded with satisfaction.A．prepareB．
• 先化简，再求值：（1a+2-1）÷a2-1a+2，其中a=2．-数学
• 先化简，再求值：a-2a2-4+1a+2，其中a=3．-数学
• ——How wise of you to come round，but why？ ——______ that all is right.A．SeeB．To seeC．SeeingD．For seein
• You can hardly imagine the trouble the woman had______her children.A．brought upB．to bring upC．bringi
• In the reading room, we found her____ at a desk, with her attention____ on a book. A．sitting; fixing
• 化简：3ab-a3b+a2b2a2+2ab+b2÷a2-aba2-b2=______．-数学
• Can you imagine what difficulty he had ____ the work?A．to doB．doC．doingD．done-高二英语
• 先化简代数式2x+6x2-4x+4÷x2+3xx-2-1x-2，然后给x赋一个你喜欢的实数，求代数式的值．-数学
• 计算：①y7x÷(-2x)②a-2a-1-2a-3a-1③12m2-9-2m-3④x2x-1-x-1．-数学
• 先化简，再选择使原式有意义而你喜欢的数代入求值：1x+1-x+2x2-1•x2-2x+1x2+4x+4．-数学
• 先化简，再求值：(xx-1-1x2-x)÷(x+1)，其中x=2．-数学