Math, asked by thotasailaja198, 1 year ago

find the square of the following number without actual multiplication?39

Answers

Answered by Irfan678

21

I hope you will understand .

Attachments:

Answered by anasshaikh25

9

Answer:

=39² = (30+9)²

=30²+9²+2×30×9

=900+81+540

=1521

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