Kvadrat tenglama va uning ildizlari — 8-sinf Algebra test savollari

1.x² + 5x − 24 = 0 tenglamani chap qismini ko‘paytuvchilarga ajratib yeching.

• A)x₁ = 3, x₂ = −8
• B)x₁ = −3, x₂ = 8
• C)x₁ = 3, x₂ = 8
• D)x₁ = −3, x₂ = −8

2.x² − x − 20 = 0 tenglamani ko‘paytuvchilarga ajratib yeching.

• A)x₁ = 5, x₂ = −4
• B)x₁ = −5, x₂ = 4
• C)x₁ = 5, x₂ = 4
• D)x₁ = −5, x₂ = −4

3.To‘g‘ri to‘rtburchakning bo‘yi enidan 8 sm ortiq, yuzi 33 sm² ga teng. To‘rtburchakning enini toping.

• A)3 sm
• B)8 sm
• C)11 sm
• D)5 sm

4.x² − 8x + 12 = 0 tenglamani ko‘paytuvchilarga ajratib yeching.

• A)x₁ = 2, x₂ = 6
• B)x₁ = −2, x₂ = −6
• C)x₁ = 2, x₂ = −6
• D)x₁ = 4, x₂ = 3

5.ax² + bx + c = 0 (a ≠ 0) tenglamada b va c koeffitsiyentlar qanday nomlanadi?

• A)b — ikkinchi koeffitsiyent, c — ozod had
• B)b — bosh koeffitsiyent, c — ikkinchi koeffitsiyent
• C)b va c — ikkalasi ham ozod had
• D)b — ozod had, c — bosh koeffitsiyent

6.5x² − 3x + 7 = 0 tenglamada bosh koeffitsiyent nechaga teng?

• A)5
• B)−3
• C)7
• D)−5

7.Kvadrat tenglamaning umumiy ko‘rinishi qanday yoziladi?

• A)ax² + bx + c = 0, a ≠ 0
• B)ax + b = 0, a ≠ 0
• C)ax² + bx + c = 0, a = 0
• D)ax³ + bx + c = 0

8.2x² + x − 1 = 0 tenglamada ozod had nechaga teng?

• A)−1
• B)1
• C)2
• D)0

9.Kvadrat tenglamada a koeffitsiyent qanday shartni qanoatlantirishi kerak?

• A)a ≠ 0
• B)a > 0
• C)a < 0
• D)a = 0

10.x² − 25 = 0 tenglama nechta haqiqiy ildizga ega?

• A)ikkita
• B)bitta
• C)uchta
• D)ildizga ega emas