[Toán 10] Phương trình vô tỉ

N

nhockthongay_girlkute

Giải pt"

a, [TEX]x^2-3x+1=\frac{-\sqrt{3}}{3}\sqrt{x^4+x^2+1}[/TEX]

b, [TEX]\sqrt{\frac{1+2x\sqrt{1-x^2}}{2}}+2x^2=1[/TEX]

[TEX]a, PT \Leftrightarrow 2(x^2-x+1)-(x^2+x+1)=\frac{-sqrt{3}}{3}\sqrt{(x^2+x+1)(x^2-x+1)}[/TEX]
[TEX]\Leftrightarrow 2\frac{x^2-x+1}{x^2+x+1}-1=\frac{-sqrt{3}}{3}\sqrt{\frac{x^2-x+1}{x^2+x+1}}[/TEX]
 
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