| 2x + 3| = x + 2
=> 2x + 3 = x + 2 hoặc 2x + 3 = -(x + 2)
2x - x = -3 + 2 2x + 3 = -x - 2
x = -1 2x + x = -3 - 2
3x = -5
x = \(\frac{-5}{3}\)
\(\left|2x+3\right|=x+2\)
\(\Rightarrow\left[{}\begin{matrix}2x+3=x+2\\2x+3=-x-2\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}2x-x=2-3\\2x+x=-2-3\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}1x=-1\\3x=-5\end{matrix}\right.\)
\(\Rightarrow\left[{}\begin{matrix}x=\left(-1\right):1\\x=\left(-5\right):3\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=-1\\x=-\frac{5}{3}\end{matrix}\right.\)
Vậy \(x\in\left\{-1;-\frac{5}{3}\right\}.\)
Chúc bạn học tốt!
alo , bạn có ở đây ko
