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Question (21)

QN0019060

Expand ((p-2)(q+4)).

(A) (pq+4p-2q-8)
(B) (pq+4p+2q+8)
(C) (pq-8)
(D) (pq+2q-4p)

Correct Answer: A

Explanation:

Multiply each term carefully.

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Question (22)

QN0019061

Expand ((m+5)(n-3)).

(A) (mn+5n-3m-15)
(B) (mn+5n+3m)
(C) (mn-15)
(D) (mn+5m-3n)

Correct Answer: A

Explanation:

Apply distributive property.

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Question (23)

QN0019062

The coefficient of (ab) in ((a+b)(a+b)) is

(A) 1
(B) 2
(C) 3
(D) 4

Correct Answer: B

Explanation:

(ab+ab=2ab).

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Question (24)

QN0019063

((a+b)(a+b)) simplifies to

(A) (a^2+b^2)
(B) (a^2+ab+b^2)
(C) (a^2+2ab+b^2)
(D) (2a^2+b^2)

Correct Answer: C

Explanation:

Standard expansion.

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Question (25)

QN0019064

Which pair are like terms?

(A) and
(B)
(C)
(D) (a^2) and (a^3)

Correct Answer: B

Explanation:

Both have same variables and powers.

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Question (26)

QN0019065

The expansion of ((x+2)(x+2)) is

(A) (x^2+4)
(B) (x^2+2x+4)
(C) (x^2+4x+4)
(D) (2x^2+4)

Correct Answer: C

Explanation:

((a+b)^2=a^2+2ab+b^2).

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Question (27)

QN0019066

Expand ((2a+b)(2a+b)).

(A) (4a^2+4ab+b^2)
(B) (4a^2+2ab+b^2)
(C) (2a^2+b^2)
(D) (4a^2+b^2)

Correct Answer: A

Explanation:

Expand and combine like terms.

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Question (28)

QN0019067

The product ((a+u)(b-v)) equals

(A) (ab+ub-av-uv)
(B) (ab+uv)
(C) (ab-av)
(D) (ab+ub+av+uv)

Correct Answer: A

Explanation:

Multiply each term.

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Question (29)

QN0019068

Expand ((7+x)(5-y)).

(A) (35+5x-7y-xy)
(B) (35+5x+7y+xy)
(C) (35-xy)
(D) (35+7x-5y)

Correct Answer: A

Explanation:

Apply distributive property carefully.

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Question (30)

QN0019069

If (a=12), (b=8), (m=-2), (n=3), then ((a+m)(b+n)) equals

(A) 110
(B) 120
(C) 100
(D) 130

Correct Answer: A

Explanation:

((12-2)(8+3)=110).

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