>
数学
>
化简求值:(x+1)²-(x-1)(x²+x+1),其中x=根号2
人气:230 ℃ 时间:2020-04-16 04:47:45
解答
原式=(x+1)平方-(x-1)(x+1)平方
= (x+1)平方x(1-x+1)
把x=根号2带入
= (根号2+1)平方x (2-根号2)
= (3+2根号2)x(2-根号2)
= 6-3根号2+4根号2-4
=2+根号2
答:式子的解为2+根号2.
推荐
[a^2-2ab+b^2/(a^2-b^2)]/(1/a-1/b),其中and=√2,b=1
1、-3(2x-1)2、2(2y-x)-(1-2x) 3、-3(2x-2/3y²)+2(-3/2x+y²)
数学必修4习题1.3,A组第三题化简步骤
四、化简比.
-X的3次方 乘以 X的2n-1次方 - X的2n次方 乘以 X的2次方!化简
两数和为3,积为-10 求这两个数
用英语简单描写你的房间
以我的卧室写一篇英语作文
猜你喜欢
carefully
After paying 1000 dollars ____,you will all become full memebers of our club A each B all c every
Our class has a map of the world (改为同义句)
The baby didn't cry any more when she saw her mother.同义句
How do you go to school,on foot or by bus?
时间旅行的悖论
设f(x)=ax7+bx5+cx3+dx+5,其中a,b,c,d为常数.若f(-7)=-7,则f(7)=_.
计算1-3+5-7+9-11+…+97-99.
© 2024 79432.Com All Rights Reserved.
电脑版
|
手机版