Ecuații. Sisteme de ecuații
Quiz
•
Mathematics
•
9th Grade
•
Hard
Olga Bîrsanu
Used 14+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Fie x1 și x2 soluțiile ecuației 2x2+3x-7=0. Fără a rezolva ecuație, calculați x1. x2
3/2
-3/2
-7/2
7/2
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Ce ecuație de gradul 2 cu necunoscuta x corespunde datelor din sistem
-7x2+13x-7=0
x2-7x+13=0
x2+7x+13=0
x2+7x-13=0
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Descompuneți în factori trinomul 2x2-3x-5=0 după formula a(x-x1)(x-x2)
(x-3)(x-5)
2(x-5)(x+1)
(2x-5)(x-1)
(2x-5)(x+1)
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Determinați domeniul de valori admisibile al ecuației
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Aflați numitorul comun al fracțiilor algebrice din ecuația dată:
x2-3
x(x-3)
x(x+1)
12x(x-3)
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
În urma determinării DVA, aflării numitorului comun ecuația dată
ați adus-o la următoarea formă
x2-2x+15=0
x2+2x-9=0
x2+2x-15=0
x2-2x-15=0
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Rezolvând ecuația, în urma aducerii la numitorul comun, ați ajuns la o ecuație de gradul II,. Care sunt soluțiile ecuației obținute?
x1=3, x2=5
x1=-3, x2=-5
x1=3, x2=-5
x1=-3,x2=5
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