What is the value of $(396) 2$ ?

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156816

143456

123456

125678

answer is A.

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Detailed Solution

Given number is

(396) 2

.
First, divide the supplied number into two parts, leaving the other part that is not a multiple of 10.
396 = 300 + 96
Square the result and simplify it,

⇒ 3962 = (300 + 96) 2 ⇒ (300 + 96) (300 + 96) ⇒ 300 (300 + 96) + 96 (300 + 96) ⇒ 90000 + 28800 + 28800 + 9216 ⇒ 156816

Hence, the value of

(396) 2

is 156816.
Therefore, option 1 is correct.

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