Đáp án:
$\text{x = 3 hoặc $x=\dfrac{1}{2}$.}$
Giải thích các bước giải:
$\text{2x² - 7x + 3 = 0.}$
$\text{⇒ 2x² - x - 6x + 3 = 0.}$
$\text{⇒ x.(2x - 1) - 3.(2x - 1) = 0.}$
$\text{⇒ (x - 3).(2x - 1) = 0.}$
$\text{⇒ \(\left[ \begin{array}{l}x-3=0.\\2x-1=0.\end{array} \right.\).}$
$\text{⇒ \(\left[ \begin{array}{l}x=3.\\2x=1.\end{array} \right.\).}$
$\text{⇒ \(\left[ \begin{array}{l}x=3.\\x=\dfrac{1}{2}.\end{array} \right.\).}$
$\text{Vậy x = 3 hoặc $x=\dfrac{1}{2}$.}$
