Đáp án:
Giải thích các bước giải:
2x³-50x=0
⇔x(2x-50)=0
⇔\(\left[ \begin{array}{l}x=0\\x=2x-50=0\end{array} \right.\)
⇔\(\left[ \begin{array}{l}x=0\\x=25\end{array} \right.\)
h)2x(3x-5)-(5-3x)=0
⇔2x(3x-5)-(3x-5)=0
⇔(3x-5)(2x-1)=0
⇔\(\left[ \begin{array}{l}3x-5=0\\-2x-1=0\end{array} \right.\)
⇔\(\left[ \begin{array}{l}x=\dfrac{5}{3}\\x=-\dfrac{1}{2}\end{array} \right.\)