Calcule cu numere reprezentate prin litere -cl.VIII-a Sc.N.Russu
Assessment
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Stoica Catalina
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Mathematics
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8th Grade
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34 plays
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Hard
Student preview
9 questions
Show all answers
1.
MULTIPLE CHOICE
1 min • 1 pt
Rezultatul calculului 3xy + 15x3 - 34xy - 12x3 + 5x3 este
2.
MULTIPLE CHOICE
30 sec • 1 pt
Efectuând înmulțirea -3x3y2z ⋅(+7xy4 ) se obține
3.
MULTIPLE CHOICE
30 sec • 1 pt
Rezultatul împărțirii (3x3 +11x3 - 34x3) : (- 5x ) este
4.
MULTIPLE CHOICE
30 sec • 1 pt
Ridicând la putere (3x2y5z)3 se obține
5.
MULTIPLE CHOICE
30 sec • 1 pt
Calculând expresia E(x) = (2x+1)2 - (x-1)2+(x-2)(x+2)-3x2+14 se obține
6.
MULTIPLE CHOICE
30 sec • 1 pt
Folosind diferența de pătrate pentru 25 - 64a2 se obține
7.
MULTIPLE CHOICE
30 sec • 1 pt
Restrângând la pătratul unei sume expesia E(x)=25x2 - 30xy + 9y2 , obținem
8.
MULTIPLE CHOICE
30 sec • 1 pt
Dacă x - y=2 și x⋅y=1 atunci x2 + y2 este egal cu
9.
MULTIPLE CHOICE
30 sec • 1 pt
Descompunând în factori expresia E(x)= (x2 + 3x + 1)·(x2 + 3x + 3) + 1, obținem
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