Toán Lớp 9: tìm x
2 nhân căn 4-3x rồi cộng 3 = x
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Toán Lớp 9: tìm x
2 nhân căn 4-3x rồi cộng 3 = x
Comments ( 1 )
2\sqrt {4 – 3x} + 3 = x\\
\Leftrightarrow 2\sqrt {4 – 3x} = x – 3\\
Dkxd:\left\{ \begin{array}{l}
4 – 3x \ge 0\\
x – 3 \ge 0
\end{array} \right. \Leftrightarrow \left\{ \begin{array}{l}
x \le \frac{4}{3}\\
x \ge 3
\end{array} \right.\left( {ktm} \right)
\end{array}$