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Question (11)

QN0019089

Expand ((2m+7)^2).

(A) (4m^2+28m+49)
(B) (4m^2+14m+49)
(C) (4m^2+49)
(D) (2m^2+28m+49)

Correct Answer: A

Explanation:

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Question (12)

QN0019090

Expand ((4x-3)^2).

(A) (16x^2-24x+9)
(B) (16x^2+24x+9)
(C) (16x^2-9)
(D) (8x^2-24x+9)

Correct Answer: A

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Question (13)

QN0019091

Evaluate (46^2) using identities.

(A) 2016
(B) 2116
(C) 2216
(D) 2026

Correct Answer: B

Explanation:

((40+6)^2=1600+480+36=2116)

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Question (14)

QN0019092

Evaluate (91^2).

(A) 8181
(B) 8281
(C) 8381
(D) 8191

Correct Answer: B

Explanation:

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Question (15)

QN0019093

Evaluate (72^2).

(A) 5084
(B) 5184
(C) 5284
(D) 5384

Correct Answer: B

Explanation:

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Question (16)

QN0019094

Evaluate (105^2).

(A) 11025
(B) 10525
(C) 10025
(D) 11225

Correct Answer: A

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Question (17)

QN0019095

Find ((100-7)^2).

(A) 8649
(B) 8749
(C) 8849
(D) 8949

Correct Answer: A

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Question (18)

QN0019096

Evaluate (98\times102).

(A) 9996
(B) 9998
(C) 10000
(D) 10004

Correct Answer: A

Explanation:

((100-2)(100+2)=10000-4)

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Question (19)

QN0019097

Evaluate (45\times55).

(A) 2475
(B) 2575
(C) 2375
(D) 2455

Correct Answer: A

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Question (20)

QN0019098

Evaluate (397\times403).

(A) 159991
(B) 160009
(C) 159001
(D) 160991

Correct Answer: A

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