Matematika sinf. Test savollari. Iii-chorak II- variant. Tog`ri to`rtburchakning eni sm ga teng, bo`yi undan sm ga ortiq bo`lsa, uning perimetrini toping

13. Soddalashtiring: (c-3)² – (c+3)(3-c) A) -6c B) 2c² – 6c C) 2c² – 6c +18 D) 0
14) Ko`paytirishni bajaring: (x² + 1)(x -1)(x+1) A) x⁴+1 B) x⁴ – 1 C) (x - 1)⁴ D) (x + 1)⁴
15. x ni shunday birhadga almashtiringki, natijada ikkihadning kvadrati hosil bo`lsin: a² – 6ab + x
A) 9b² B) b² C) 36b² D) 3b
16. Hisoblang: 139∙15 + 18∙139 + 15∙261 + 18∙261. A) 13200 B) 132400 C) 1320 D) 1324
17. Hisoblang: 26∙ − ∙23 . A) 4 B) 3 C) D) 2
18. Hisoblang: (12a⁴b³ +21a²b⁴) : 3a²b³ A) 4a + 7 b B) 4ab + 7b C) 4a² + 7b D) 4a² + 7ab
19. Birhadning son qiymatini toping: , bunda a= -2, b= -1, c=10. A) -8 B) 8 C) D) -
20. O`xshash hadlarni ixchamlang: 5a² – 4b² – 3a² + b² . A) -6a²b² B) 2a²-3b² C) a²-2b² D) 6a²b².
21. Agar uchburchakning ikkita burchagi 40⁰ va 30⁰ ga teng bo`lsa, uning uchinchi burchagiga qo`shni burchagini toping. A) 100⁰ B) 70⁰ C) 110⁰ D) 120⁰
22. Uzunliklari 4 sm, 5 sm , 6 sm, 7 sm bo`lgan kesmalardan nechta uchburchak yasash mumkin ?