Sửa đề
6x2 - 11x - 10 = 0
\(\Leftrightarrow\) 6x2 + 4x - 15x - 10 = 0
\(\Leftrightarrow\) 2x(3x + 2) - 3(3x + 2) = 0
\(\Leftrightarrow\) (2x - 3)(3x + 2) = 0
\(\Leftrightarrow\) \(\left[{}\begin{matrix}2x-3=0\\3x+2=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{3}{2}\\x=-\dfrac{2}{3}\end{matrix}\right.\)
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