H
hongdangnguyen


1) [TEX]\sqrt[]{x^2 -4x +3}-\sqrt[]{2x^2-3x+1}=x-1[/TEX]
2)[TEX]\sqrt[]{x^2-3x+2}+\sqrt[]{x^2-4x+3}=2\sqrt[]{x^2-5x+4}[/TEX]
2)[TEX]\sqrt[]{x^2-3x+2}+\sqrt[]{x^2-4x+3}=2\sqrt[]{x^2-5x+4}[/TEX]