C
cloudymay


bai 1:
[TEX]\frac{x^2 + 17x + 4}{x + 2} = 4\sqrt{x}[/TEX]
bai 2:[TEX]\sqrt{(x + 1)(2 - x)} = 1 + 2x - 2{x^2}[/TEX]
bai 3:
[TEX](4x - 1){\sqrt{x^2 + 2x - 1} = 2{x^2} + 2x + 1[/TEX]
[TEX]\frac{x^2 + 17x + 4}{x + 2} = 4\sqrt{x}[/TEX]
bai 2:[TEX]\sqrt{(x + 1)(2 - x)} = 1 + 2x - 2{x^2}[/TEX]
bai 3:
[TEX](4x - 1){\sqrt{x^2 + 2x - 1} = 2{x^2} + 2x + 1[/TEX]