โจทย์เลขชั้นมัธยมศึกษาปีที่ 3 (ตอน 1 )พร้อมเฉลย
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1. (22)^2+68 x-62=52
2. (12)^2+60 x-59=28
3. (17)^2+40 x-20=35
4. (34)^2+61 x-15=57
5. ?17?^2+68 x-74=22
6. 5^2+65 x-29=19
7. ?30?^2+71 x-27=77
8. ?22?^2+67 x-1=11
9. ?18?^2+42 x-2=60
10. 7^2+24 x-28=49
11. ?31?^2+76 x-60=55
12. ?25?^2+76 x-20=27
13. ?13?^2+25 x-38=46
14. ?21?^2+55 x-59=70
15. 6^2+22 x-69=48
16. ?14?^2+72 x-22=12
17. ?34?^2+60 x-14=66
18. ?30?^2+45 x-15=68
19. 9^2+30 x-41=54
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Answer Sheet
1. x=-185/34?-5.4411764705882
2. x=-19/20?-0.95
3. x=-117/20?-5.85
4. x=-1084/61?-17.7704918032787
5. x=-193/68?-2.8382352941177
6. x=23/65?0.3538461538462
7. x=-796/71?-11.2112676056338
8. x=-472/67?-7.044776119403
9. x=-131/21?-6.2380952380952
10. x=7/6?1.1666666666667
11. x=-423/38?-11.1315789473684
12. x=-289/38?-7.6052631578947
13. x=-17/5?-3.4
14. x=-312/55?-5.6727272727273
15. x=81/22?3.6818181818182
16. x=-9/4?-2.25
17. x=-269/15?-17.9333333333333
18. x=-817/45?-18.1555555555556
19. x=7/15?0.4666666666667