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Question

The value of (107)2 is________.

A
11449
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B
11249
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C
16469
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D
12569
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Solution

The correct option is B 11449
(107)2 = (100 + 7)2.

Using the identity,

(a+b)2 = (a)2+2ab+(b)2,

(100 + 7)2 = (100)2+2(7)(100)+(7)2
= 10000 + 1400 + 49
= 11449.

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