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Question

What is the value obtained when we expand (1+3)2?
 



A

29 +2√5

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B

29 + 4√5

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C

9 + 2√5

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D

9 + 4√5

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Solution

The correct option is A

9 + 2√5


(1+3)2=(1+3)(1+3)
=1+3+23=4+23


Mathematics

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