C
congtubannong123


Giải pt sau :
[tex] 1; (\sqrt{x+3}-\sqrt{x+1})(x^2+\sqrt{x^2+4x+3})=2x[/tex]
[tex]2; 10x^2+3x+1=\sqrt{x^2+3}(1+6x)[/tex]
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[tex] 1; (\sqrt{x+3}-\sqrt{x+1})(x^2+\sqrt{x^2+4x+3})=2x[/tex]
[tex]2; 10x^2+3x+1=\sqrt{x^2+3}(1+6x)[/tex]
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