b: \(\Leftrightarrow\left|2x-2\right|=1-3x\)
\(\Leftrightarrow\left\{{}\begin{matrix}x< =\dfrac{1}{3}\\\left(2x-2-1+3x\right)\left(2x-2+1-3x\right)=0\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}x< =\dfrac{1}{3}\\\left(5x-3\right)\left(-x-1\right)=0\end{matrix}\right.\Leftrightarrow x=-1\)
c: \(\Leftrightarrow2x-4\sqrt{x}+\sqrt{x}-2=7\)
\(\Leftrightarrow2x-3\sqrt{x}-9=0\)
=>2x-6 căn x+3 căn x-9=0
=>căn x-3=0
hay x=9
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