Kvadrat funksiya — 10-sinf Algebra test savollari

1.y=-2x²+8x-5 funksiyaning grafigi uchun uning uchini (vertex) toping.

• A)(2;3)
• B)(2;-3)
• C)(-2;3)
• D)(4;3)

2.y=3x²-12x+7 funksiyaning eng kichik qiymatini toping.

• A)-5
• B)5
• C)-7
• D)-2

3.x²-(m+1)x+(m+4)=0 tenglama teng ildizlarga ega bo'lishi uchun m ning qiymatlari qanday?

• A)m=5 yoki m=-3
• B)m=-5 yoki m=3
• C)m=2 yoki m=-15
• D)m=1 yoki m=-4

4.2x²-4x-6=0 tenglama ildizlarining ko'paytmasini toping.

• A)-3
• B)3
• C)-2
• D)2

5.x²-7x+10=0 tenglama ildizlari yig'indisi bilan ko'paytmasi ayirmasini toping.

• A)-3
• B)3
• C)17
• D)-17

6.y=x²-6x+8 funksiyaning nollarini (ildizlarini) toping.

• A)2 va 4
• B)-2 va -4
• C)2 va -4
• D)-2 va 4

7.y=-x²+4x-1 funksiya grafigi uchining absissasini toping.

• A)2
• B)-2
• C)4
• D)-4

8.y=2x²-8x+3 funksiya qaysi oraliqda o'suvchi?

• A)[2;+∞)
• B)(-∞;2]
• C)[-2;+∞)
• D)(-∞;-2]

9.y=5x²-3x+9 funksiya grafigining Oy o'qi bilan kesishish nuqtasini toping.

• A)(0;9)
• B)(0;-9)
• C)(0;5)
• D)(0;-3)

10.x²+4x+7=0 tenglamaning haqiqiy ildizlari sonini aniqlang.

• A)haqiqiy ildizi yo'q
• B)ikkita har xil ildiz
• C)ikkita teng ildiz
• D)uchta ildiz