Ecuații
Quiz
•
Mathematics
•
7th Grade
•
Practice Problem
•
Hard
Aliona Lascu
Used 4+ times
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6 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Numărul –2 este soluţie a ecuaţiei:
x2 + 4 = 0
(x - 2)2 = - 4
(x + 1)(x + 2) = 0
-4x = - 8
2.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Selectați egalitățile care descriu propoziția : "Numărul 20 este mai mare cu 8 decât numărul x"
8 = 20 + x
20 + 8 =x
20 = x + 8
x = 20 - 8
3.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Care dintre elementele muțimii M = {0; 1; -1; 2} sunt soluții ale ecuației x(x+2) = 0
0
1
-2
2
4.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
Subsituiți cele trei puncte cu un număr, astfel încât ecuația obținută să aibă soluția x = - 3 :
... x = -18
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Care este mulțimea soluțiilor pentru ecuația :
x 2 = 9
S = {3}
S = {-3}
S = {-3; 3}
S = ∅
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Care este mulțimea soluțiilor pentru ecuația :
x 2 = -16
S = {4}
S = {-4}
S = {-4; 4}
S = ∅
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