\(|2x+3|=x+2\)
=> 2x+3=x+2 hoặc -(2x+3)=x+2
=>2x-x=2-3 -2x-3=x+2
=> x=-1 -2-3=x+2x
-5=3x => x=-5/3
Vậy x=-1; -5/3.Em tham khảo rồi cho chị biết đúng hay sai nha!
\(\left|2x+3\right|=x+2\)
\(\Leftrightarrow\orbr{\begin{cases}2x+3=x+2\\2x+3=-x-2\end{cases}}\)\(\Leftrightarrow\orbr{\begin{cases}2x-x=2-3\\2x+x=-2-3\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}x=-1\\3x=-5\end{cases}\Leftrightarrow}\orbr{\begin{cases}x=-1\\x=-\frac{5}{3}\end{cases}}\)
Vậy \(x\in\left\{-\frac{5}{3};-1\right\}\)
I 2x + 3 I = x + 2
TH1 : 2x + 3 dương
2x + 3 = x + 2
2x - x = 2 - 3
x = -1
TH2 : 2x + 3 âm
- ( 2x + 3 ) = x + 2
-2x - 3 = x + 2
-2x - x = 2 + 3
-3x = 5
x = 5 : ( -3 )
x = 5/-3 = -5/3
\(|2x+3|=x+2\)
\(Th1:2x+3=x+2\)
\(2x-x=-3+2\)
\(x=-1\)
\(Th2:2x+3=-x+2\)
\(2x+x=-3-2\)
\(3x=-5\)
\(x=-\frac{5}{3}\)