ai giải giúp mình với (x^2+x)^2 + 4(x^2+x)=4
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left(3x+2\right)\left(x-1\right)-3\left(x+1\right)\left(x-2\right)=4\)
\(\Rightarrow3x^2-3x+2x-2-3\left(x^2-2x+x-2\right)=4\)
\(\Rightarrow3x^2-x-2-3x^2+3x+6=4\)
\(\Rightarrow2x+4=4\)
\(\Rightarrow2x=0\Leftrightarrow x=0\)
![](https://rs.olm.vn/images/avt/0.png?1311)
1.2(x-1)+(x-2)=x-4
2x-2+x-2=x-4
2x+ x-x=2+2-4
2x=0
=> x=0
Vậy x=0
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
`1/2 xx 1/3 xx 1/4`
`= (1xx1xx1)/(2xx3xx4)`
`= 1/24`
__
`1/2 xx 1/3 : 1/4`
`= 1/2 xx 1/3 xx 4`
`= (1xx1xx4)/(2xx3)`
`= 4/6`
`=2/3`
__
`1/2 : 1/3 xx1/4`
`= 1/2 xx 3 xx 1/4`
`=(1xx3xx1)/(2xx4)`
`= 3/8`
__
`1/2 : 1/3 : 1/4`
`= 1/2 xx 3xx4`
`= 12/2`
`=6`
`1/2xx1/3xx1/4`
`=1/24`
`1/2xx1/3:1/4`
`=1/6xx4`
`=4/6=2/3`
`1/2:1/3xx1/4`
`=1/2xx3xx1/4`
`=3/2xx1/4`
`=3/8`
`1/2:1/3:1/4`
`=1/2xx3xx4`
`=6`
![](https://rs.olm.vn/images/avt/0.png?1311)
Xin lỗi mình xót
Tìm x dể biểu thức P=\(\frac{^2}{x^4+x^2+1}\)đạt giá trị lớn nhất
![](https://rs.olm.vn/images/avt/0.png?1311)
đk : \(x\ne4,-4\)
A= \(\frac{8+x-4}{\left(x+4\right)\left(x-4\right)}:\frac{2\left(x-4\right)-x^2}{2x\left(x+4\right)}\)
A = \(\frac{x+4}{\left(x-4\right)\left(x+4\right)}.\frac{2x\left(x+4\right)}{x^2+2x-8}\)
A=\(\frac{1}{x-4}.\frac{2x\left(x+4\right)}{\left(x+4\right)\left(x-2\right)}=\frac{2x}{\left(x-4\right)\left(x-2\right)}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{x+1}{99}+\frac{x+2}{99}+\frac{x+3}{99}+\frac{x+4}{99}=-4\)
=>\(\frac{\left(x+1\right)+\left(x+2\right)+\left(x+3\right)+\left(x+4\right)}{99}=-4\)
=> (x+1)+(x+2)+(x+3)+(x+4)=-4.99=-396
=>4x+10=-396
4x=-406
x=-406:4=-101,5
![](https://rs.olm.vn/images/avt/0.png?1311)
Số số hạng vế trái
\(\dfrac{x-2}{2}+1=\dfrac{x}{2}\)
\(\dfrac{\dfrac{x}{2}\left(2+x\right)}{2}=2652\)
\(\Rightarrow x\left(2+x\right)=4.2652=10608\)
\(\Leftrightarrow x^2+2x+1=10609\)
\(\Leftrightarrow\left(x+1\right)^2=10609=103^2\)
\(\Rightarrow x+1=103\Rightarrow x=102\)
(x^2+x)^2 + 4(x^2+x)=4
=>(x^2+x)^2 + 4(x^2+x)+4-8=0
=>(x^2+x+2)^2-8 = 0
Chịu rồi!