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8. klass KORDAMINE

Authored by Kairi Proov

Mathematics

8th Grade

Used 30+ times

8. klass KORDAMINE
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25 questions

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1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

(2x + 5y)2 =

4x2 + 20xy + 25y2

4x2 + 10xy + 25y2

4x2 + 25y2

4x2 + 14xy + 25y2

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

(a - 6)2 =

a2 - 12a + 36

a2 - 6a + 36

a2 - 36

2a2 - 14a + 36

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

(2a + 5)(5 - 2a) =

4a2 - 25

25 - 4a2

4a2 + 25

4a2 - 20a + 25

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

-5x(x - 2y) =

-5x2 + 10xy

-4x - 10xy

-5x2 - 10xy

5x2y

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

6a2b5(3ab3 - 5b) =

18a3b8 - 30a2b6

18a2b8 - 30a2b5

18a3b8 + 30a2b6

-12a3b7

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

(6x8y + 8x5y2) : 2x5y =

3x3 + 4y

3x3y + 4xy

7x8y2

3x8y + 4x5y2

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Tegurda.

1 - 16k2 =

(1 - 4k)(1 + 4k)

(1 + 4k)(4k - 1)

1 - 4k

4k(1 - k)

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