----- Nội dung dịch tự động từ ảnh -----
Bài 1. Tính và rút gọn:

1. \(\sqrt{2}\)
2. \((-\sqrt{2})^2\)
3. \(\sqrt{3}\)
4. \((-\sqrt{3})^2\)
5. \(\sqrt{4}\)
6. \((-\sqrt{4})^2\)
7. \(\sqrt{5}\)
8. \((-\sqrt{5})^2\)
9. \(\sqrt{6}\)
10. \((-\sqrt{6})^2\)
11. \(\sqrt{7}\)
12. \((-\sqrt{7})^2\)
13. \(\sqrt{8}\)
14. \((-\sqrt{8})^3\)
15. \((-\sqrt{8})^3\)
16. \((-\sqrt{9})^2\)
17. \(\sqrt{10}\)
18. \((-\sqrt{10})^2\)
19. \(\sqrt{11}\)
20. \((-\sqrt{11})^2\)
21. \(\left(-\frac{1}{2}\right)^2\)
22. \(\sqrt{\frac{2}{3}}\)
23. \(\left(\frac{2}{3}\right)^2\)
24. \(\left(-\frac{2}{3}\right)^2\)
25. \(\sqrt{4}\)
26. \(\left(-\frac{4}{5}\right)^2\)
27. \(\left(\frac{3}{4}\right)^2\)
28. \(\left(-\frac{3}{4}\right)^2\)
29. \(\left(\frac{1}{5}\right)^2\)
30. \((-\frac{1}{5})^2\)
31. \((0.5)^2\)
32. \((-\sqrt{0.5})^2\)
33. \((0.01)^2\)
34. \((-0.01)^2\)
35. \((0.0001)^2\)
36. \((-0.0001)^2\)
37. \(\sqrt{x}\)
38. \(\sqrt{4}\)
39. \(\sqrt{x^8}\)
40. \(\sqrt{a^{12}}\)
41. \(\sqrt{(x+1)^2}\)
42. \(\sqrt{(3x)^2}\)
43. \(\sqrt{(2x+1)^2}\)
44. \(\sqrt{(x+5)^2}\)
45. \(\sqrt{(4-2x)^2}\)
46. \(\sqrt{a^2 - 2a + 1}\)
47. \(\sqrt{4x^4 - 4x + 1}\)
48. \(\sqrt{a^2 - a + \frac{1}{4}}\)
49. \(\sqrt{x^2 + 6x + 9}\)
50. \(\sqrt{1 - 6a + 9a^2}\)
51. \(\sqrt{(x-1)^2}\) với \(x \leq 1\)
52. \(\sqrt{(x-5)^2}\) với \(x \geq 5\)