\(6x^2-4x-2=0\)
=>\(3x^2-2x-1=0\)
=>\(3x^2-3x+x-1=0\)
=>(x-1)(3x+1)=0
=>\(\left[{}\begin{matrix}x-1=0\\3x+1=0\end{matrix}\right.\)
=>\(\left[{}\begin{matrix}x=1\\x=-\dfrac{1}{3}\end{matrix}\right.\)
\(2x^2-7x+5=0\)
=>\(2x^2-2x-5x+5=0\)
=>(x-1)(2x-5)=0
=>\(\left[{}\begin{matrix}x-1=0\\2x-5=0\end{matrix}\right.\)
=>\(\left[{}\begin{matrix}x=1\\x=\dfrac{5}{2}\end{matrix}\right.\)