Kết quả tìm kiếm

$\sqrt{\frac{x-2\sqrt{x}+1}{x+2\sqrt{x}+1}}\\=\sqrt{\frac{(\sqrt{x})^2-2\sqrt{x}.1+1}{(\sqrt{x})^2+2\sqrt{x}.1+1}}\\=\sqrt{\frac{(\sqrt{x}-1)^2}{(\sqrt{x}+1)^2}}\\=\frac{\sqrt{(\sqrt{x}-1)^2)}}{\sqrt{(\sqrt{x}+1)^2}}\\=\frac{\left | \sqrt{x}-1 \right |}{\left | \sqrt{x}+1 \right...

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=3x^2+8x-17 chứ ạ

$x^2-x-6\\=x^2+2x-3x-6\\=x(x+2)-3(x+2)\\=(x-3)(x+2)$

Nick của Tú đây hả???

1) Viết lại câu nghĩa ko đổi a)Marry has operated Jom since 10 o'clock. ->Jom has been operated by Marry since 10 o'clock. b)This is the second time they have written to us about this. ->This is the second time this has been written to us. c)Mr.Simth has taught French for two year. ->French has...

câu A Ca(OH)2

Câu 1 đi đạt !!!.......................

When I was 9, I hated (pick)......being picked.......... up early by my mother.

1. In spite of the traffic jam, we managed getting. to the airport on time A B C D 2. many people are still unaware about enviromental pollution A B C...

còn đề nào nữa không đạt? Tuần sau trường tui cũng kiểm tra 6 bài đó luôn á.

$A=\frac{x^2-\sqrt{x}}{x+\sqrt{x}+1}-\frac{2x+\sqrt{x}}{\sqrt{x}}+\frac{2(x-1)}{\sqrt{x}-1}\\=\frac{\sqrt{x}[(\sqrt{x})^3-1]}{x+\sqrt{x}+1}-\frac{\sqrt{x}(2\sqrt{x}+1)}{\sqrt{x}}+\frac{2(\sqrt{x}-1)(\sqrt{x}+1)}{\sqrt{x}-1}\\=\frac{\sqrt{x}(\sqrt{x}-1)(x+\sqrt{x}+1)}{x+\sqrt{x}+1}-2\sqrt{x}-1+2\s...