Ecuații de gradul al doilea II
Quiz
•
Mathematics
•
8th - 9th Grade
•
Practice Problem
•
Hard
Elena Teodorescu
Used 26+ times
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11 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Care dintre următoarele este o ecuație de gradul al doilea, formă completă?
ах2 + bх = 0
ах2 + bx+c= 0
ax2 = 0
ax2+c= 0
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ecuația de gradul al doilea care are coeficienții a=3, b=2 și c=-1 este:
3x2-2x-1=0
2x-1+3x2=0
3+x2-x=0
2x2+2-3x=0
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dacă discriminantul este mai mare decât zero, pentru a calcula soluțiile ecuației , folosim formula:
4.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Care dintre următoarele poate fi descompusă folosind formula A2-B2=(A-B)(A+B) ?
36+12m+m2
25-x2
z2+16
4y2-1
5.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Care dintre următoarele poate fi restrânsă folosind formula A2+2AB+B2=(A+B)2 ?
4x2+4x+1
n2+5n+25
9+6z+z2
16y2-8y+1
6.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Care dintre următoarele poate fi restrânsă folosind formula A2-2AB+B2=(A-B)2 ?
16p2-8p+1
x2-10x+25
9+6y+y2
z2-2z+4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ecuația ax2+bx+c=0 are soluții reale egale dacă
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