S
soididem


bài 1 : [tex]\sqrt{x^2+2x}+\sqrt{2x-1}=\sqrt{3x^2+4x+1}[/tex]
bài 2 : [tex]x^2+(3-\sqrt{x^2+2})x=1+2\sqrt{x^2+2}[/tex]
bài 3 : [tex]4\sqrt{x+1}-1=3x+2\sqrt{1-x}+\sqrt{1-x^2}[/tex]
bài 2 : [tex]x^2+(3-\sqrt{x^2+2})x=1+2\sqrt{x^2+2}[/tex]
bài 3 : [tex]4\sqrt{x+1}-1=3x+2\sqrt{1-x}+\sqrt{1-x^2}[/tex]