Math, asked by shaikhowaisamjad, 1 month ago

B={y|y square=9} is it a singleton set

Answers

Answered by pushpalatapatel633

0

Step-by-step explanation:

⟶x

2

+4x+4=0

⟹(x+2)

2

=0

⟹x=−2.

∵x∈N

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