优课网
首页
数学
语文
英语
化学
物理
政治
历史
生物
首页
> (1)(-3)2-(3.14-π)0+(-12)3(2)(-2ab)(3a2-2ab-b2)(3)(2x-5)(2x+5)-(2x+1)(2x-3)(4)(x3+3)2-(x3-3)2(5)(x+1)
(1)(-3)2-(3.14-π)0+(-12)3(2)(-2ab)(3a2-2ab-b2)(3)(2x-5)(2x+5)-(2x+1)(2x-3)(4)(x3+3)2-(x3-3)2(5)(x+1)
题目简介
(1)(-3)2-(3.14-π)0+(-12)3(2)(-2ab)(3a2-2ab-b2)(3)(2x-5)(2x+5)-(2x+1)(2x-3)(4)(x3+3)2-(x3-3)2(5)(x+1)
题目详情
(1)(-3)
2
-(3.14-π)
0
+(-1
2
)
3
(2)(-2ab)(3a
2
-2ab-b
2
)
(3) (2x-5)(2x+5)-(2x+1)(2x-3)
(4)
(
x
3
+3
)
2
-(
x
3
-3
)
2
(5)(x+1)(x+3)-(x-2)
2
(6)(a+b+3)(a+b-3)
(7)(9x
2
y-6xy
2
+3xy)÷( 3xy)
题型:解答题
难度:中档
来源:不详
答案
(1)(-3)2-(3.14-π)0+(-12)3=9-1+(-1)3=9-1-1=7;
(2)(-2ab)(3a2-2ab-b2)=-6a3b+4a2b2-+2ab3;
(3) (2x-5)(2x+5)-(2x+1)(2x-3)=4x2-25-4x2+4x+3=4x-22;
(4)
(
class="stub"x
3
+3
)
2
-(
class="stub"x
3
-3
)
2
=(
class="stub"x
3
+3+
class="stub"x
3
-3)(
class="stub"x
3
+3-
class="stub"x
3
+3)=12×
class="stub"x
3
=4x;
(5)(x+1)(x+3)-(x-2)2=x2+4x+3-x2+4x-4=8x-1;
(6)(a+b+3)(a+b-3)=(a+b)2-9=a2+2ab+b2-9;
(7)(9x2y-6xy2+3xy)÷( 3xy)=3x-2y+1.
故答案为7、-6a3b+4a2b2-+2ab3、4x-22、4x、8x-1、a2+2ab+b2-9、3x-2y+1.
上一篇 :
10-2等于()A.100B.-20C.0.01D.-0.01-
下一篇 :
________ I know, the place w
搜索答案
更多内容推荐
— Mom,Dad is smoking again!— Well, let him cut it ________ gradually since old habits die hard.[ ]A.
—What did you do last night ?—a composition , I finished my physics homework .A.Instead ofB.Apart fr
She would rather(宁愿) have a room ______ than sleep with her sister.A.on her ownB.of her ownC.of hers
She felt very upset ___________ what her deskmate said.A because B because of C as if D unless-高一英语
改错题。 假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文。文中共有10初语言错误,每句中最多有两处。对标有题号的每一行作出判断:如无错误,在该行-高三英语
Even if you come here times,I don’t let you go.A.a great dealB.a great deal ofC.a great manyD.a grea
计算:(﹣2)0+()﹣2=();32004×()2003=();(﹣)﹣1=()。-七年级数学
He began to take political science_____ only when he left school. A.strictlyB.trulyC.carefullyD.ser
He left the phone so that he wouldn’t be disturbed.A.by the hookB.off the hookC.off hookD.by hook-英
计算:(π-3.14)0-(12)-1=______.-数学
计算题:(1)(-2a3b2c)3÷(4a2b3)2-a4c•(-2ac2);(2)(3x2+4x-1)(3x2-4x-1);(3)(a-2)(a2+a+1)+(a-3)(1-a)(a+3);(4)(
计算:(1)(x3)4+(2x4)3;(2)|-3|+(-1)2011×(π-3)0-9+(12)-2.-数学
We are now enjoying the cool air in the room.________,the farmers are harvesting crops in the hot su
As the matter is _____, I can't give you a definite answer. [ ]A. under discussion B. under dis
Go back to your room and leave meI like being by myself.A.lonelyB.aloneC.alongD.almost-英语
Polar bears liveon sea ice,which they use as a platform for hunting sealsA.mostB.almostC.nearlyD.mos
There is a feeling _____ me______ we’ll never know what a UFO is --- not ever.A.in; thatB.on; whichC
Only one third of the people present at the meeting voted the new law.A.in search ofB.in favor ofC.i
It is said that about 60% of housewives have a brand before entering the store.A.in mindB.on saleC.i
A short, thin man, __ past middle age, visited the manager and applied for the job.A.muchB.wellC.too
Yesterday evening when going to the cinema I frequented, I went in a wrong direction ___.A.somehowB.
计算:(12)-1=______.-数学
The same gestures, signs and so on, in other words, body language, may express different ideas or me
-Your plan is well designed. --Thank you. But I think it is far from ____.A.perfectB.perfectlyC.perf
During the summer vocation we went back to the school __ to pay a visit to our teachers though it wa
Although ____ my opinion, the old professor didn’t come up with his own.A.againstB.onC.forD.in-英语
If you let me make a choice ______ Jane and Anne, I would say Jane is______one to be my assistant.A.
Taking charge of the big company, I’m afraid, is _____ his ability.After all, it is only three years
I sometimes think that all his supposed mistakes are made ______ just to make me angry.A.at duskB.on
A study show that students with positive attitudes _____life and open minds _____differen deas often
(3m+6)0=1,则m的取值范围是______.-数学
He should feel proud of himself______his progress in musicA in hope of B in search of C in terms of
----What’s your first impression ________ Mrs Wang? ----She looks serious. I think she’ll be strict
She is quite a different girl _____ she was five years ago.A.fromB.toC.thanD.with-英语
.I hope I will not be called on in class as I’m not yet____prepared.A.attentivelyB.readilyC.actively
I know nothing about the matchI read in the newspaper.A.besidesB.expectC.except thatD.except what-高二
Griffin is naughty, talkative, casual, but _____, his classmates think he is not so tiresomeA.in a w
化简a2-aa2-1+(a+1)-1的结果是______.-数学
This box is so heavy that he cannot lift it. ________, he is only a ten-year-old child.A.In allB.Abo
You have to explain ____ us the reason _____ your being absent from school yesterday.A.to; of B.to;
—Was Martin sorry for what he had done? —_______. It was just like him.A.Never mindB.All rightC.Not
Sometimes it was a bit boring to work there because there wasn't always ______ much to do.A.suc
Only ___________ this direction can you reach the railway station.A.withB. inC.underD.to-高一英语
计算:3-2-(-3)0=______.-数学
计算:(2-1)0=______.-数学
Alan is a careful driver, but he drives ______ of my friends.A.more carefullyB.the most carefullyC.l
The children loved their day trip,and they enjoyed the horse ride_____. A.mostB.moreC.lessD.little-高
I knew we would be friends ____ I met you on campus.A.the first timeB.at the first timeC.for the fir
The financial crisis is attacking the USA, and it is true ___ many other countries.A.toB.againstC.of
Some of the European languages come from Latin,________ French,Italian and Spanish.A.for exampleB.su
返回顶部
题目简介
(1)(-3)2-(3.14-π)0+(-12)3(2)(-2ab)(3a2-2ab-b2)(3)(2x-5)(2x+5)-(2x+1)(2x-3)(4)(x3+3)2-(x3-3)2(5)(x+1)
题目详情
(2)(-2ab)(3a2-2ab-b2)
(3) (2x-5)(2x+5)-(2x+1)(2x-3)
(4)(
(5)(x+1)(x+3)-(x-2)2
(6)(a+b+3)(a+b-3)
(7)(9x2y-6xy2+3xy)÷( 3xy)
答案
(2)(-2ab)(3a2-2ab-b2)=-6a3b+4a2b2-+2ab3;
(3) (2x-5)(2x+5)-(2x+1)(2x-3)=4x2-25-4x2+4x+3=4x-22;
(4)(
(5)(x+1)(x+3)-(x-2)2=x2+4x+3-x2+4x-4=8x-1;
(6)(a+b+3)(a+b-3)=(a+b)2-9=a2+2ab+b2-9;
(7)(9x2y-6xy2+3xy)÷( 3xy)=3x-2y+1.
故答案为7、-6a3b+4a2b2-+2ab3、4x-22、4x、8x-1、a2+2ab+b2-9、3x-2y+1.