
Clasa a IX -a
Authored by Tutaș Silvia-Iulia
Mathematics
9th - 12th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Care este forma generală a unei ecuații de gradul al II-lea?
a) ax + b = 0
b) ax² + bx + c = 0
c) ax² = c
d) ax² + c = b
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câte soluții reale poate avea o ecuație de gradul al II-lea?
a) Doar una
b) Întotdeauna două
c) Zero, una sau două
d) Infinit
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Discriminantul unei ecuații de forma ax² + bx + c = 0 este dat de formula:
a) D = b² − 2ac
b) D = b² − 4ac
D = 4ac − b²
D = a² + b²
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Rezolvați ecuația: x² − 5x + 6 = 0
a) x₁ = 1, x₂ = 6
b) x₁ = 2, x₂ = 3
c) x₁ = -2, x₂ = -3
d) x₁ = 5, x₂ = 1
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dacă D = 0, atunci ecuația de gradul al II-lea are:
a) Două soluții reale diferite
b) Nicio soluție
c) O soluție reală dublă
d) Două soluții complexe
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Care este soluția ecuației: x² + 4x + 5 = 0?
a) x₁ = -2 + i, x₂ = -2 − i
b) x₁ = 1, x₂ = -5
c) x₁ = -1, x₂ = -4
d) x₁ = 0, x₂ = -5
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pentru ce valoare a lui m, ecuația x² + 2mx + m = 0 are o soluție dublă?
a) m = 0
b) m = 1
c) m = 4
d) m = 1
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