1+1=
ai nhanh thì kb
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Ta có : |2x - 1| = 3x + 1
\(\Leftrightarrow\orbr{\begin{cases}2x-1=3x+1\\3x-1=-3x-1\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}2x-3x=1+1\\3x+3x=-1+1\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}-x=2\\3x+3x=-1+1\left(loại\right)\end{cases}}\)
=> x = -2
Ông Trung làm sai rồi, x = 0 mới đúng chứ.
Thay x = -2 vào đâu đúng.
1 + 1 = 2 nha
1+1=2 k mk di nha