Toán Lớp 9: $(m^{2}-m)x^{2}+2mx+1=0$ tìm m để pt có nghiệm
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Toán Lớp 9: $(m^{2}-m)x^{2}+2mx+1=0$ tìm m để pt có nghiệm
Comments ( 1 )
\to \left\{ \begin{array}{l}
{m^2} – m \ne 0\\
\Delta ‘ \ge 0
\end{array} \right.\\
\to \left\{ \begin{array}{l}
m\left( {m – 1} \right) \ne 0\\
{m^2} – \left( {{m^2} – m} \right) \ge 0
\end{array} \right.\\
\to \left\{ \begin{array}{l}
m \ne \left\{ {0;1} \right\}\\
m \ge 0
\end{array} \right.\\
\to m > 0;m \ne 1
\end{array}\)