优课网
首页
数学
语文
英语
化学
物理
政治
历史
生物
首页
> (1)计算:(-1)2÷12+(-2)3×34-(12)0;(2)计算:[(2x-y)(2x+y)+y(y-6x)]÷(2x).-数学
(1)计算:(-1)2÷12+(-2)3×34-(12)0;(2)计算:[(2x-y)(2x+y)+y(y-6x)]÷(2x).-数学
题目简介
(1)计算:(-1)2÷12+(-2)3×34-(12)0;(2)计算:[(2x-y)(2x+y)+y(y-6x)]÷(2x).-数学
题目详情
(1)计算:(-1)
2
÷
1
2
+(-2)
3
×
3
4
-(
1
2
)
0
;
(2)计算:[(2x-y)(2x+y)+y(y-6x)]÷(2x).
题型:解答题
难度:中档
来源:不详
答案
(1)(-1)2÷
class="stub"1
2
+(-2)3×
class="stub"3
4
-(
class="stub"1
2
)0,
=2-6-1,
=-5;
(2)[(2x-y)(2x+y)+y(y-6x)]÷(2x),
=(4x2-y2+y2-6xy)÷2x,
=(4x2-6xy)÷(2x),
=2x-3y.
故答案为-5、2x-3y.
上一篇 :
--- Is the food served in th
下一篇 :
— I don’t feel sympathy __
搜索答案
更多内容推荐
Everybody was touched _____ words after they heard her moving story.[ ]A.beyondB.withoutC.ofD.in-高三英
Ladies and gentlemen, I have the great privilege____ introducing our speaker for tonight.A.inB.ofC.a
It’s always difficult being in a foreign country , ____ when you can’t speak the local language .A.g
计算:-6-1=______.-数学
计算:-(13)-2+|-3|-0+364.-数学
Tom is wise than smart. Few people can solve such a problem but he can.A.no lessB.no moreC.lessD.mor
Little children should go to school to learn something. ______,they should learn how to behave well
The company was named Gates Hall ______ a man named James Gates.A.in need ofB.in search ofC.in favou
计算.(1)(1-π)0-3•sin60°+(-2)3•(14)2(2)(12)-1-2cos45°+3×0.-数学
Although this medicine can cure you _____your illness,it has a bad effect ________you.A.for;in B.for
.Could you keep silent a few minutes, please? You are here_________.A.in a wayB.on the wayC.in my wa
I admired my classmate Lisa very much. ______ her prettiness, she was smart and helpful.A.Except for
The museum was___opened this morning and some officials attended the opening ceremony(开幕式).A.globall
It has been said that one can experience four seasons in the course of a single day in no country Br
- Is this the dictionary you want?-- Oh, that’s not what I want. I mean the New English-Chinese Dict
The demand for _____ skilled workers is still increasing.A.highB.higherC.highlyD.more highly-高一英语
We are onlyglad to do anything we canher.A.very; helpingB.very; helpC.too; helpD.too; to help-高三英语
What he did ______ what he said moved us.A.more thanB.other than C.rather thanD.no more than-高三英语
Although she doesn’t like to live in the country, _______ , she goes there for a picnic.A.once in a
Glancing ______ his shoulder, Eric could see the dog was running after him.A.overB.acrossC.throughD.
计算:13+2+(-2)2×132+2sin30°-(32-2008)0.-数学
若实数m满足m2-10m+1=0,则m4+m-4=______.-数学
计算(1)|-2|-9+(π-3)°(2)(1+x-2x+2)÷2xx2-4-数学
The building was named Ford Hall________ a man named James Ford.A.in place ofB.in celebration ofC.in
We couldn’t believe the news,for it was__________ good. A.surprisedlyB.surprisinglyC.likelyD.lovely-
. Jim’s leg was ______ damaged in the accident. He now walks with a limp.A.permanentlyB.increasingly
During our argument, the teacher said a lot of unilateral(片面的) words ______ the other student who di
Water, _____ we cannot live, exists in the form of liquid, gas or solid. A.from which B.on which C.w
With so many hungry children seated round the table, the food disappeared ______.A.in timeB.at a tim
计算:-32+(5-π)0-|1-3|+(-13)-2.-数学
Parents are advised to take pressure their chileren and give them some encouragement before an exam.
Most of the fans felt rather disappointed at the concert. They said it could have been _______ organ
解答下列各题:(1)计算:(12)-1-(2010-3)0+4sin30°-|-2|;(2)化简并求值:(x-x-4x-3)÷x2-4x-3,其中x=5.-数学
This is a_______complicated(复杂的)problem.I don’t know how to solve it.A.veryB.much tooC.muchD.too muc
Sometimes advertisements make________ possible for companies to sell the customers________ money ca
The average cost of school residential trips was £ 48 in primary schools and £ 55 in secondaries in
(1)计算:8-(3-1)0+|-1|(2)化简:6m2-9÷2m-3-mm+3.-数学
______ having a busy schedule, Ariel Lin attended an environmental art exhibition. A.Despite ofB.In
计算2sin60°+(-2)-1-(2-3)2÷(21-2)0.-数学
China now aims to boost domestic demand, and this ______ would help the global economy.A.in shortB.o
计算:(13)-1×(π-10)0-12+|-23|+(-1)2.-数学
I lost my wallet last week, but ____ it didn’t contain much money at that time.A.luckilyB.hopefullyC
He came home______yesterday.A.lateB.latterC.latelyD.later-高二英语
Their university is located on a beautiful lake, ____ of this developing city. A.southeast thirty mi
There, a big memorial has been built______ him, who devoted himself to the poor.A.in favor ofB.in m
计算:(1)2-1-tan60°+(5-1)0+|-3|;(2)先化简再求值:a-1a+2•a2-4a2-2a+1÷1a2-1,其中a满足a2-a=0.-数学
We met an old friend in New York ____our expectation. She waved at us _____ the street when she saw
The written record of the conversation doesn’t correspond ______ what was actually said. A.byB.toC.i
The conference has been held to discuss the effects of tourism _______ the wildlife in the area.A.on
计算(12)-2的结果是()A.14B.-14C.4D.-4-数学
返回顶部
题目简介
(1)计算:(-1)2÷12+(-2)3×34-(12)0;(2)计算:[(2x-y)(2x+y)+y(y-6x)]÷(2x).-数学
题目详情
(2)计算:[(2x-y)(2x+y)+y(y-6x)]÷(2x).
答案
=2-6-1,
=-5;
(2)[(2x-y)(2x+y)+y(y-6x)]÷(2x),
=(4x2-y2+y2-6xy)÷2x,
=(4x2-6xy)÷(2x),
=2x-3y.
故答案为-5、2x-3y.