
equazioni di secondo grado
Authored by monica zacchi
Mathematics
10th Grade
Used 19+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Per quali valori dell'incognita x è soddisfatta la seguente equazione: x2 - 5 x = 0
0; 5
2; 4
0; 8
-1; +1
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Una delle soluzioni dell'equazione
2x2 - 5x + 3 = 0
è 1, l'altra soluzione è:
5/2
2/5
3/2
- 3/2
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
L’equazione x2 = 6x – 9
ha soluzioni:
x1 = 3 e x2 = -3
non ha soluzioni
solo x = 3
solo x =- 3
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
L'equazione di secondo grado
x2 + 3x - 28 = 0 :
non ha radici reali
ha due radici reali distinte
ha due radici reali coincidenti
ha due radici reali opposte
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
In un’equazione di secondo grado ax2 + bx + c = 0 il discriminante ∆ `e :
∆ = -b2 −4ac
∆ = b2 −ac
∆ = b2 + 4ac
∆ = b2 −4ac
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Risolvendo un’equazione di secondo grado trovo ∆ = 0 ; che cosa possiamo affermare?
l’equazione non ha soluzione
l’equazione ha due soluzioni coincidenti
l’equazione ha due soluzioni distinte
non `e possibile dire niente
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Quante soluzioni ha l’equazione 4x2 = 0 ?
2 distinte
2 coincidenti
nessuna
l’equazione non ha senso perch´e mancano dei termini.
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