Chala kvadrat tenglamalar va ularni yechish — 8-sinf Algebra test savollari

1.3x² − 27 = 0 chala kvadrat tenglamani yeching.

• A)x₁ = 3, x₂ = −3
• B)x₁ = 9, x₂ = −9
• C)x = 3 (bitta ildiz)
• D)ildizi yo‘q

2.0,04x² − 16 = 0 chala kvadrat tenglamani yeching.

• A)x₁ = 20, x₂ = −20
• B)x₁ = 4, x₂ = −4
• C)x₁ = 400, x₂ = −400
• D)ildizi yo‘q

3.5x² + 15x = 0 chala kvadrat tenglamani yeching.

• A)x₁ = 0, x₂ = −3
• B)x₁ = 0, x₂ = 3
• C)x₁ = −3, x₂ = 3
• D)x = 0 (bitta ildiz)

4.7x² = 0 tenglamani yeching.

• A)x = 0 (bitta ildiz)
• B)ildizi yo‘q
• C)x₁ = 0, x₂ = 7
• D)x = 7

5.x² + 9 = 0 tenglama haqiqiy sonlar to‘plamida nechta ildizga ega?

• A)ildizga ega emas
• B)bitta ildizga ega
• C)ikkita ildizga ega
• D)cheksiz ko‘p ildizga ega

6.ax² + c = 0 (c ≠ 0) ko‘rinishdagi chala kvadrat tenglama qanday holatda haqiqiy ildizlarga ega bo‘ladi?

• A)a va c turli ishorali bo‘lganda
• B)a va c bir xil ishorali bo‘lganda
• C)har doim
• D)hech qachon

7.ax² + bx = 0 (b ≠ 0) ko‘rinishdagi tenglama har doim qaysi ildizga ega?

• A)x = 0
• B)x = 1
• C)x = −1
• D)ildizga ega emas

8.4x² − 81 = 0 tenglamani yeching.

• A)x₁ = 4,5, x₂ = −4,5
• B)x₁ = 9, x₂ = −9
• C)x = 4,5 (bitta ildiz)
• D)ildizi yo‘q

9.$\frac{x^2}{5}=0$ tenglamaning ildizini toping.

• A)x = 0
• B)x = 5
• C)ildizi yo‘q
• D)x = ±5

10.9x² − x = 0 tenglamani yeching.

• A)x₁ = 0, x₂ $=\frac{1}{9}$
• B)x₁ = 0, x₂ = 9
• C)$x=\frac{1}{9}$(bitta ildiz)
• D)ildizi yo‘q