Question

Find the square of the following numbers using ( x + y)square = x square + 2 xy + y square . ? 199​

Answer 1

Answer:

(199)^2

=(200-1)^2

=200(200-1)-1(200-1)

=40000-200-200+1

=40000-400+1

=39600+1

=369011 ans

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