[Toán 9] $2009(2009-2010x^2)^2-x=0$

N

nguyengiahoa10

[tex]2009{(2009 - 2010{x^2})^2} - x = 0[/tex]
[tex] \Leftrightarrow 2009 - 2010{x^2} = \frac{x}{{2009}}[/tex]
[tex] \Leftrightarrow \frac{x}{{2009}} - 2009 = 2010{x^2}[/tex]
ĐK: [tex]\frac{x}{{2009}} - 2009 \ge 0 \Leftrightarrow \frac{x}{{2009}} \ge 2009(voli)[/tex]
[tex] \Rightarrow \fbox{ptvn}[/tex]
 
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