giải hệ pt

V

vodichhocmai

[TEX]\left{2x^2-\frac{5x}{y+1}+\frac{2}{(y+1)^2}=0\\4x^2+4y^2+8y=97[/TEX]

[TEX]DK\ \ y\neq -1[/TEX]

[TEX]\blue \Leftrightarrow\left{2x^2-\frac{5x}{t}+\frac{2}{t^2}=0\\4x^2+4t^2=101\\t=y+1[/TEX] [TEX]\red \Leftrightarrow\left{2t^2x^2-5tx+2=0\\4x^2+4t^2=101\\t=y+1[/TEX][TEX]\blue \Leftrightarrow\left{x=\frac{5\pm 3}{4t}\\4x^2+4t^2=101\\t=y+1[/TEX]

[TEX]Done!![/TEX]
 
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