Toán Lớp 9: 1. √2????−1=3
2. √5????+9−4=3
3. 2√2????−3=2
4. 2+√????−1=3
5. 3+√7????+4=8
6. 11−√2????−5=8
7. √????−1=√1−????
8. √2????−5=√1−????
9. √36????2+12????+1=2
10. √36????2+12????+1=7
11. √4????2−12????+9=6
12. √4????2−4????+1=5
13. √????2−4????+4=6
14. √1+6????+9????2=7
15. √25−10????+????2=7
16. √????2−8????+16−2????−7=0
17. √????2+2????+2=????−1
18. √????2+????+11=????+2
19. √????2+2????+2=????−1
20. √????2+????−5=√????−1
21. √9(1−2????)2=15
22. √4(1−2????)2=6
23. √16????−32−23√9????−18+3√????−2=15
24. 5√9????−9−√4????−4−√????−1−36=0
25. √16????+32+13√9????+18−4√????+24=12
26. √9????−36−12√4????−16+6√????−49=20
27. √18????+9+12√32????+16=√25????+25