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Формули скороченого множення

Authored by Елена Черняк

Mathematics

7th Grade

Used 3+ times

Формули скороченого множення
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10 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

(5а + 3b) (5а – 3b) =...

5а2 – 3b2

25а2 + 9b2

5а2 + 3b2

25а2 – 9b2

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

(7а + 2)2 =...

49а2 + 28а + 4 

49а2 + 14а + 4

49а2 + 4

7а2 + 28а + 4 

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

(9аb)2 =...

81а2  – 9аb + b2

81а2  –  b2

81а2  –  18аb + b2

9а2  – 18аb + b2

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

(а + 7)( а2 – 7а + 49) =...

а3 –  343 

а2 – 49 

а3 + 343 

а3 + 7 

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

(с – 8)(с2 + 8с + 64) =... 

с2 – 64 

с3 – 512 

с3 + 512 

с3 – 8 

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

( b2 + 4)( b2 + 4) =...

16 – b2

b4  – 16 

b4  – 16 

16  b4

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

(а2 + 1)(а + 1)(а – 1) =...

а4 – 1 

а2 – 2 

а2 – 1 

а2 – 2 

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