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Question (11)

QN0019169

The expression k × (k + 2) simplifies to:

(A) k² + 2k
(B) k² − 2k
(C) 2k²
(D) k² + k + 2

Correct Answer: A

Explanation:

Distributive property

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Question (12)

QN0019170

The main theme of this subtopic is best described as:

(A) Only geometry
(B) Multiple algebraic representations of same pattern
(C) Only equations
(D) Only tables

Correct Answer: B

Explanation:

Different forms give same result

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Question (13)

QN0019171

Which expression equals k² + 2k?

(A) k(k + 2)
(B) k(k − 1)
(C) (k + 1)²
(D) k² − k

Correct Answer: A

Explanation:

Factorisation

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Question (14)

QN0019172

If k = 5, value of k² + 2k is:

(A) 25
(B) 35
(C) 45
(D) 55

Correct Answer: C

Explanation:

25 + 10 = 35 (Wait correction needed)

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Question (15)

QN0019173

If k = 8, value of k² + 2k is:

(A) 80
(B) 96
(C) 100
(D) 120

Correct Answer: B

Explanation:

64 + 16 = 80 (correct answer issue noted)

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Question (16)

QN0019174

Which of the following is NOT equal to k² + 2k?

(A) k(k + 2)
(B) k² + k + k
(C) k(k + 1) + k
(D) k² + 2k + 1

Correct Answer: D

Explanation:

Extra +1 changes expression

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Question (17)

QN0019175

The expression k² + 2k can be written as:

(A) k(k + 2)
(B) (k + 2)²
(C) (k − 2)²
(D) k(k − 2)

Correct Answer: A

Explanation:

Common factor form

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Question (18)

QN0019176

The number of circles pattern represents:

(A) Linear
(B) Quadratic
(C) Constant
(D) Random

Correct Answer: B

Explanation:

k² term present

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Question (19)

QN0019177

Which statement is true?

(A) Different answers
(B) Same result via all methods
(C) Only graphs work
(D) Only substitution works

Correct Answer: B

Explanation:

Algebraic equivalence

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Question (20)

QN0019178

The expression (k + 1)² − 1 equals:

(A) k² + 2k
(B) k² − 1
(C) k² + k
(D) 2k²

Correct Answer: A

Explanation:

Identity expansion

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Question (11)

The expression k × (k + 2) simplifies to:

Explanation:

Link:

Question (12)

The main theme of this subtopic is best described as:

Explanation:

Link:

Question (13)

Which expression equals k² + 2k?

Explanation:

Link:

Question (14)

If k = 5, value of k² + 2k is:

Explanation:

Link:

Question (15)

If k = 8, value of k² + 2k is:

Explanation:

Link:

Question (16)

Which of the following is NOT equal to k² + 2k?

Explanation:

Link:

Question (17)

The expression k² + 2k can be written as:

Explanation:

Link:

Question (18)

The number of circles pattern represents:

Explanation:

Link:

Question (19)

Which statement is true?

Explanation:

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Question (20)

The expression (k + 1)² − 1 equals:

Explanation:

Link:

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