化简：a2-42a÷(a2-2a-2a)，并指出a的取值范围．-数学

更多内容推荐

• (1-2x+1)2÷x-1x+1-数学
• 已知1m-1n=2，则代数式5mnm+7mn-n的值为______．-数学
• 化简：(2xx-1-xx+1)÷xx2-1．-数学
• 先化简再求值：x2-1x+1-x2+2x+1x2+x÷1x+1，其中x=-2．-数学
• 化简：（1）2aa2-4-1a-2（2）(x-2x+2+4xx2-4)÷1x2-4．-数学
• It rained heavily in the south， serious flooding in several provinces.A．causingB．having causedC．caus
• 先化简，再求值(xx-2-xx+2)÷4xx-2，其中x=2-2．-数学
• 先化简：3-xx-2÷(x+2-5x-2)，选择一个你喜欢的无理数，然后再求值．-数学
• Tom had no choice but _____ the classroom with his classmates.A．to cleanB．cleanC．cleaningD．cleans-英语
• ----Did the reference give the information you needed?----Yes, but it, I had to read it entirely. A．
• It is typical of students to stay up ________ deep into the night for the final exam.A．to readB．havi
• The long-lasting war, filled with blood and deaths, ended in people’s sadness, ______ no result.A．h
• He was close to______ in the accident.A．be killedB．being killedC．killedD．killing-高二英语
• 当x=-2时，分式11+x的值为（）A．1B．-1C．2D．-2-数学
• 先化简，再求值：x-yx÷(x-2xy-y2x)，其中x=2012，y=2013．-数学
• 观察下列各式：62-42=4×5，112-92=4×10，172-152=4×16，…，（1）你发现了什么规律？试用你发现的规律填空：512-492=4×______；752-732=4×．（2）请你
• The murderer was brought in, with his hands _____ behind his back. A．being tiedB．having tied C．to be
• 先化简，再求值：，其中a=1--九年级数学
• 有一道题目“先化简，再求值：(x+3x-3-6xx2-9)÷1x2-9，其中x=-7．”小明做题时把“x=-7”错抄成了“x=7”，但他的计算结果也是正确的，请你解释这是怎么回事？-数学
• 已知（a+1a-1）（11+a3-1）÷a31-a，其中a=99，求原式的值．-数学
• 已知x2-y2=xy，且xy≠0，求代数式x2y-2+x-2y2的值．-数学
• ----Can you attend tomorrow’s meeting?----I am sorry , but I will have too much work__________．A．to
• They wanted the house at the foot of the mountain ________ in a way to look pretty.A．buildB．to build
• 先化简：a2-b2a2+ab÷（a+2ab+b2a），当b=-1时，再从-3＜a＜2的范围内选取一个合适的整数a代入求值．-数学
• 计算题：（1）(3b24a3)2•(-32a2b)3；（2）12m-1m+n(m+n2m-m-n)；（3）1-(1-11-x)2÷x2-x+1x2-2x+1-数学
• 先化简再求值：(x-y-x2x+y)÷(2y2x2+2xy+y2)+x2-y2x-y，其中x≠y且x，y满足（x-y）（x+y-12）=0．-数学
• For Chinese Dream, many people dream of_______ a good chance for a better job.A．there isB．there to b
• An underwater hotel has opened in Africa，with its rooms＿on the bottom of a three－level floating buil
• 先化简，再求值：(x-2)-xx2-4+4x+2，其中x=1．-数学
• 计算题：（1）8x2•(-3x4y3)•(-6zx2y)；（2）12m2-9-2m-3；（3）（-3ab-1）3；（4）4xy2z÷（-2x-2yz-1）；（5）a-1-a2a-1；（6）a2-4a2
• The boy promised ______late for school again.A．to not beB．not to beC．not beingD．being not-英语
• It is believed that movies, also ________ motion pictures, were introduced into China near the end
• Nobody likes ______.A．to speak ill of B．to be spoken ill ofC．speaking ill ofD．spoken ill of-英语
• his business, he had little time to have fun with his little daughter.A．Absorbed inB．Be addicted inC
• ________ we stand; ________ we fall.A．United ; dividedB．United ; dividingC．Uniting ; dividingD．Unit
• ______ with a moon rover(月球车) called “Yutu” (Jade Rabbit) , Chang'e-3 successfully landed on th
• _____ his position as mayor to give jobs to his friends，Williams is now under investigation．A．Abused
• 化简求值：(1x+1+1x-1)•x2-1x2+3x，其中x=3．-数学
• 计算(3xx-2-xx+2)•x2-4x=______．-数学
• Feng Xiaogang，＿＿＿＿＿＿＿＿＿by many as a leading director，left his handprint at the TCL Chinese Theatre．A
• 已知1a-1b=6，则a-2ab-b2a-2b+7ab的值等于（）A．85B．-85C．45D．-45-数学
• 化简：（x2x-2+42-x）÷x-22x．-数学
• 已知：1f=1u+1v（f，u，v均不为0），试用f，u表示v，则v=______．-数学
• After the Six­Party Talk in Beijing, an agreement was reached _____that North Korea would abando
• .________ the right kind of training, these teenage soccer players may one day grow the internationa
• 化简分式计算：x-3x2-1÷x2+xx2+2x+1-1x-1，并选择一个你认为合适的x的值，求代数式的值．-数学
• 先化简，再求值：(a-4+4a)÷4-a2a2+2a，其中a=-4．-数学
• The trend of Phubbing group (低头族) getting increasingly large is spreading worldwide, ______ many pr
• I can’t have him _______ fun of others.A．makeB．makingC．madeD．to make-高三英语
• 化简与计算（1）计算：a2a-2+42-a；12m2-9-2m-3．（2）先化简再求值(3xx-2-xx+2)÷2xx2-4，其x=3-4；a2-4a2+6a+9÷a-22a+6，其中a=-5．-数学