
Ταυτότητες στα Μαθηματικά
Authored by Σοφία Συρά
Mathematics
9th Grade

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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ποια είναι η ταυτότητα του αθροίσματος δύο τετραγώνων;
(a + b)² = a² + 2ab + b²
(a + b)² = 2a² + 2b²
(a + b)² = a² - 2ab + b²
(a + b)² = a² + b²
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Απλοποιήστε την έκφραση: (x + y)².
x² + 2xy + y²
xy + y²
2x + 2y
x² + y²
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ποια είναι η ταυτότητα του διαφοράς δύο τετραγώνων;
(a - b)(a - b) = a² + b²
(a + b)(a + b) = a² + b²
(a + b)(a - b) = a² + b²
(a - b)(a + b) = a² - b²
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ποια είναι η ταυτότητα του αθροίσματος δύο αριθμών;
a + b = a - b
a + b = b + a
a + b = a * b
a + b = b - a
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Απλοποιήστε την έκφραση: (a + b)² - (a - b)².
4ab
a² - b²
(a + b)(a - b)
2ab
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ποια είναι η ταυτότητα του αθροίσματος τριών αριθμών;
Το άθροισμα εξαρτάται από την σειρά.
Το άθροισμα είναι πάντα μεγαλύτερο από τους αριθμούς.
Το άθροισμα είναι το μέσο όρο των αριθμών.
Το άθροισμα είναι ανεξάρτητο από την σειρά.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Διασπάστε την ταυτότητα: (x + y + z)².
x² + y² + z² + 2xy + 2xz + 2yz
x² + y² + z² + xy + xz + yz
x² + y² + z² + 3xy + 3xz + 3yz
x² + y² + z² + 2xy + 2xz
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